diff --git a/build.py b/render.py
similarity index 100%
rename from build.py
rename to render.py
diff --git a/rwx/fs/__init__.py b/rwx/fs/__init__.py
index 8a45288..b55713a 100644
--- a/rwx/fs/__init__.py
+++ b/rwx/fs/__init__.py
@@ -2,9 +2,9 @@
 
 import os
 import shutil
-from pathlib import Path
-
 import tomllib
+import yaml
+from pathlib import Path
 
 from rwx import ps
 
@@ -133,6 +133,19 @@ def read_file_text(file_path: Path, charset: str = CHARSET) -> str:
     return read_file_bytes(file_path).decode(charset)
 
 
+def read_file_yaml(file_path: Path, charset: str = CHARSET) -> dict | list:
+    """Read whole file as yaml object.
+
+    :param file_path: source input file
+    :type file_path: Path
+    :param charset: charset to use for decoding input
+    :type charset: str
+    :rtype: dict
+    """
+    text = read_file_text(file_path, charset)
+    return yaml.safe_load(text)
+
+
 def wipe(path: Path) -> None:
     """Wipe provided path, whether directory or file.
 
diff --git a/rwx/prj/__init__.py b/rwx/prj/__init__.py
index ea6a67e..f545f73 100644
--- a/rwx/prj/__init__.py
+++ b/rwx/prj/__init__.py
@@ -22,4 +22,4 @@ class Project(Object):
 
     def build(self) -> None:
         """Build the project."""
-        run(str(self.root / "build.py"))
+        run(str(self.root / "render.py"))
diff --git a/rwx/sw/ytdlp/__init__.py b/rwx/sw/ytdlp/__init__.py
new file mode 100644
index 0000000..9045781
--- /dev/null
+++ b/rwx/sw/ytdlp/__init__.py
@@ -0,0 +1,379 @@
+"""YouTube DownLoad."""
+
+from datetime import datetime
+from pathlib import Path
+from typing import Any
+
+from yt_dlp import YoutubeDL
+
+from rwx import Object
+from rwx.fs import read_file_yaml
+from rwx.log import stream as log
+
+SUBTITLES_EXTENSIONS = ["vtt"]
+TIMESTAMP = "%Y%m%d%H%M%S"
+URL = "https://youtube.com"
+
+
+# ╭─────────╮
+# │ classes │
+# ╰─────────╯
+
+
+class Cache(Object):
+    """YouTube local cache."""
+
+    def __init__(self, root_file: Path) -> None:
+        self.root_file = root_file.resolve()
+        self.root_directory = self.root_file.parent
+        self.load()
+
+    def load(self) -> None:
+        d = read_file_yaml(self.root_file)
+        log.info(d)
+
+
+class Channel(Object):
+    """YouTube channel."""
+
+    def __init__(self, channel_id: str) -> None:
+        """Set objects tree.
+
+        :param channel_id: channel identifier
+        :type channel_id: str
+        """
+        d = extract_videos(channel_id)
+        # channel
+        self.uid = d["channel_id"]
+        self.title = d["channel"]
+        self.followers = int(d["channel_follower_count"])
+        self.description = d["description"]
+        self.tags = d["tags"]
+        self.thumbnails = [thumbnail["url"] for thumbnail in d["thumbnails"]]
+        self.thumbnail = self.thumbnails[-1]
+        self.uploader_id = d["uploader_id"]
+        self.uploader = d["uploader"]
+        # videos
+        self.videos = [
+            Video(entry)
+            for entry in reversed(d["entries"])
+            if entry["availability"] != "subscriber_only"
+        ]
+        # playlists
+        d = extract_playlists(channel_id)
+        self.playlists = [Playlist(entry) for entry in reversed(d["entries"])]
+
+
+# TODO Format
+class Format(Object):
+    """YouTube format."""
+
+    @staticmethod
+    def get(d: dict, key: str) -> str | None:
+        value = d.get(key)
+        match value:
+            case "none":
+                return None
+            case _:
+                return value
+
+    def __init__(self, d: dict) -> None:
+        """Set format info.
+
+        :param d: format info
+        :type d: dict
+        """
+        self.uid = d["format_id"]
+        self.extension = d["ext"]
+        self.filesize = d.get("filesize")
+        self.filesize_approx = d.get("filesize_approx")
+        self.language = d.get("language")
+        self.quality = d.get("quality")
+        # video
+        self.video_codec = Format.get(d, "vcodec")
+        if self.video_codec:
+            self.video_bit_rate = d["vbr"]
+            self.video_dynamic_range = d["dynamic_range"]
+            self.video_extension = d["video_ext"]
+            self.video_fps = d["fps"]
+            self.video_height = int(d["height"])
+            self.video_width = int(d["width"])
+        else:
+            del self.video_codec
+        # audio
+        self.audio_codec = Format.get(d, "acodec")
+        if self.audio_codec:
+            self.audio_bit_rate = d["abr"]
+            self.audio_channels = int(d["audio_channels"])
+            self.audio_extension = d["audio_ext"]
+            self.audio_sampling_rate = d["asr"]
+        else:
+            del self.audio_codec
+
+    def audio(self) -> str:
+        return f"{self.uid} \
+→ {self.audio_sampling_rate} × {self.audio_channels} \
+@ {self.audio_bit_rate} × {self.audio_codec}"
+
+    def video(self) -> str:
+        return f"{self.uid} \
+→ {self.video_width} × {self.video_height} × {self.video_fps} \
+@ {self.video_bit_rate} × {self.video_codec}"
+
+
+# TODO Playlist/extra
+class Playlist(Object):
+    """YouTube playlist."""
+
+    def __init__(self, d: dict) -> None:
+        """Set playlist info.
+
+        :param d: playlist info
+        :type d: dict
+        """
+        self.uid = d["id"]
+        self.title = d["title"]
+
+
+class Subtitles(Object):
+    """YouTube subtitles."""
+
+    def __init__(self, uid: str, d: dict) -> None:
+        """Set subtitles info.
+
+        :param d: subtitles info
+        :type d: dict
+        """
+        self.uid = uid
+        self.extension = d["ext"]
+        self.name = d["name"]
+        self.url = d["url"]
+
+
+# TODO Thumbnail
+
+
+class Video(Object):
+    """YouTube video."""
+
+    def __init__(self, d: dict) -> None:
+        """Set video info.
+
+        :param d: video info
+        :type d: dict
+        """
+        self.description_cut = d["description"]
+        self.uid = d["id"]
+        self.title = d["title"]
+        self.duration = int(d["duration"])
+        self.thumbnail = d["thumbnails"][-1]["url"]
+
+    def load_extra(self):
+        self.at = datetime.now().strftime(TIMESTAMP)
+        d = extract_video(self.uid)
+        self.audio_formats = []
+        self.video_formats = []
+        for entry in d["formats"]:
+            f = Format(entry)
+            if hasattr(f, "video_codec"):
+                self.video_format = f
+                self.video_formats.append(f)
+            elif hasattr(f, "audio_codec"):
+                self.audio_format = f
+                self.audio_formats.append(f)
+        thumbnail = d["thumbnails"][-1]["url"]
+        # TODO compare existing thumbnail
+        self.description = d["description"]
+        self.channel_id = d["channel_id"]
+        self.duration = int(d["duration"])
+        self.views = int(d["view_count"])
+        self.categories = d["categories"]
+        self.tags = d["tags"]
+        self.automatic_captions = []
+        for uid, entries in d["automatic_captions"].items():
+            for entry in entries:
+                subtitles = Subtitles(uid, entry)
+                if subtitles.extension in SUBTITLES_EXTENSIONS:
+                    self.automatic_captions.append(subtitles)
+        self.subtitles = []
+        for uid, entries in d["subtitles"].items():
+            for entry in entries:
+                subtitles = Subtitles(uid, entry)
+                if subtitles.extension in SUBTITLES_EXTENSIONS:
+                    self.subtitles.append(subtitles)
+        self.chapters = d["chapters"]
+        self.likes = d["like_count"]
+        self.timestamp = datetime.fromtimestamp(d["timestamp"]).strftime(
+            TIMESTAMP
+        )
+        self.fulltitle = d["fulltitle"]
+
+
+# ╭──────────╮
+# │ download │
+# ╰──────────╯
+
+
+def download_video(video_id: str | None) -> None:
+    if video_id:
+        ytdl(
+            {
+                "format": "bestvideo[ext=webm]+bestaudio[ext=webm]",
+                "outtmpl": "%(id)s.%(ext)s",
+                "postprocessors": [
+                    {
+                        "key": "SponsorBlock",
+                        "categories": ["sponsor"],
+                    },
+                    {
+                        "key": "ModifyChapters",
+                        "remove_sponsor_segments": ["sponsor"],
+                    },
+                ],
+                "writesubtitles": True,
+                "writethumbnail": True,
+            },
+        ).download([url_video(video_id)])
+
+
+# ╭─────────╮
+# │ extract │
+# ╰─────────╯
+
+
+def extract(url: str) -> dict[str, Any]:
+    """Return extracted dict.
+
+    :rtype: dict
+    """
+    d = ytdl(
+        {
+            "extract_flat": True,
+            "skip_download": True,
+        },
+    ).extract_info(url, download=False)
+    log.debug(d)
+    return d
+
+
+def extract_playlist(playlist_id: str) -> dict:
+    """Return extracted playlist dict.
+
+    :param playlist_id: playlist identifier
+    :type playlist_id: str
+    :rtype: dict
+    """
+    return extract(url_playlist(playlist_id))
+
+
+def extract_playlists(channel_id: str) -> dict:
+    """Return extracted playlists dict.
+
+    :param channel_id: channel identifier
+    :type channel_id: str
+    :rtype: dict
+    """
+    return extract(url_playlists(channel_id))
+
+
+def extract_video(video_id: str) -> dict:
+    """Return extracted video dict.
+
+    :param video_id: video identifier
+    :type video_id: str
+    :rtype: dict
+    """
+    return extract(url_video(video_id))
+
+
+def extract_videos(channel_id: str) -> dict:
+    """Return extracted videos dict.
+
+    :param channel_id: channel identifier
+    :type channel_id: str
+    :rtype: dict
+    """
+    return extract(url_videos(channel_id))
+
+
+# ╭──────╮
+# │ next │
+# ╰──────╯
+
+
+def next_download(videos: list[str]) -> str | None:
+    for index, video_id in enumerate(videos):
+        if not Path(f"{video_id}.mp4").exists():
+            log.info(f"{index} ∕ {len(videos)}")
+            return video_id
+    return None
+
+
+# ╭─────╮
+# │ url │
+# ╰─────╯
+
+
+def url_channel(channel_id: str) -> str:
+    """Return channel URL.
+
+    :param channel_id: channel identifier
+    :type channel_id: str
+    :rtype: str
+    """
+    return f"{URL}/channel/{channel_id}"
+
+
+def url_playlist(playlist_id: str) -> str:
+    """Return playlist URL.
+
+    :param playlist_id: playlist identifier
+    :type playlist_id: str
+    :rtype: str
+    """
+    return f"{URL}/playlist?list={playlist_id}"
+
+
+def url_playlists(channel_id: str) -> str:
+    """Return playlists URL.
+
+    :param channel_id: channel identifier
+    :type channel_id: str
+    :rtype: str
+    """
+    return f"{url_channel(channel_id)}/playlists"
+
+
+def url_video(video_id: str) -> str:
+    """Return video URL.
+
+    :param video_id: video identifier
+    :type video_id: str
+    :rtype: str
+    """
+    return f"{URL}/watch?v={video_id}"
+
+
+def url_videos(channel_id: str) -> str:
+    """Return videos URL.
+
+    :param channel_id: channel identifier
+    :type channel_id: str
+    :rtype: str
+    """
+    return f"{url_channel(channel_id)}/videos"
+
+
+# ╭──────╮
+# │ ytdl │
+# ╰──────╯
+
+
+def ytdl(opt: dict) -> YoutubeDL:
+    options = {
+        **opt,
+        "ignoreerrors": False,
+        "quiet": False,
+    }
+    log.info(options)
+    return YoutubeDL(options)
diff --git a/rwx/sw/ytdlp/video.py b/rwx/sw/ytdlp/video.py
new file mode 100644
index 0000000..e69de29
diff --git a/rwx/web/__init__.py b/rwx/web/__init__.py
new file mode 100644
index 0000000..e746872
--- /dev/null
+++ b/rwx/web/__init__.py
@@ -0,0 +1,32 @@
+import requests
+
+from rwx import Object, txt
+from rwx.txt import CHARSET
+
+
+def fetch(url: str) -> str:
+    response = requests.get(url)
+    response.raise_for_status()
+    return response.text
+
+
+class Page(Object):
+    def __init__(self):
+        self.charset = CHARSET
+        self.description = ""
+        self.title = ""
+
+    def render(self) -> str:
+        return f"""\
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="{self.charset}">
+<meta name="description" content="{self.description}">
+<meta name="viewport" content="width=device-width, initial-scale=1">
+<title>{self.title}</title>
+</head>
+<body>
+</body>
+</html>
+"""
diff --git a/sh/alias/git.sh b/sh/alias/git.sh
index cadd10b..fe5380a 100644
--- a/sh/alias/git.sh
+++ b/sh/alias/git.sh
@@ -307,6 +307,14 @@ a__git_log_all() {
 		"${@}"
 }
 
+# log all history as oneline
+glao() { a__git_log_all_oneline "${@}"; }
+a__git_log_all_oneline() {
+	a__git_log_all \
+		--oneline \
+		"${@}"
+}
+
 # log all history with patches
 glap() { a__git_log_all_patch "${@}"; }
 a__git_log_all_patch() {
@@ -316,6 +324,14 @@ a__git_log_all_patch() {
 		"${@}"
 }
 
+# log history as oneline
+glo() { a__git_log_oneline "${@}"; }
+a__git_log_oneline() {
+	a__git_log \
+		--oneline \
+		"${@}"
+}
+
 # log history with patches
 glp() { a__git_log_patch "${@}"; }
 a__git_log_patch() {
diff --git a/sh/cryptsetup.sh b/sh/cryptsetup.sh
index 900083d..fd20a64 100644
--- a/sh/cryptsetup.sh
+++ b/sh/cryptsetup.sh
@@ -1,6 +1,127 @@
-_rwx_cmd_cs() { rwx_crypt_setup "${@}"; }
+_rwx_cmd_cs() { rwx_crypt "${@}"; }
 
-rwx_crypt_setup() {
-	local action="${1}"
-	echo "cs: ${action}"
+RWX_CRYPT_ROOT="/data/home/user/crypt"
+RWX_CRYPT_VAR="/var/lib/crypt"
+
+rwx_crypt_device() {
+	local device size
+	local index=0
+	while [ -z "${device}" ]; do
+		device="/dev/nbd${index}"
+		if [ -b "${device}" ]; then
+			size="$(cat /sys/block/nbd"${index}/size")"
+			[ "${size}" -eq 0 ] ||
+				device=""
+		else
+			device=""
+			break
+		fi
+		index=$((index + 1))
+	done
+	if [ -n "${device}" ]; then
+		echo "${device}"
+	else
+		rwx_log_error 1 "No device available"
+	fi
+}
+
+rwx_crypt() {
+	local action="${1}"
+	local action_close="close"
+	local action_open="open"
+	local mapper="/dev/mapper"
+	local mount_root="/media"
+	local crypt_arg crypt_file crypt_map crypt_mount pass_phrase
+	case "${action}" in
+	"${action_close}" | "${action_open}")
+		shift
+		local user_id
+		user_id="$(id --user)"
+		[ "${user_id}" -eq 0 ] ||
+			rwx_log_error 1 "Not root"
+		[ -n "${1}" ] ||
+			rwx_log_error 2 "No files"
+		[ "${action}" = "${action_open}" ] &&
+			pass_phrase="$(rwx_read_passphrase)"
+		for crypt_arg in "${@}"; do
+			rwx_log_info
+			crypt_file="${RWX_CRYPT_ROOT}/${crypt_arg}.qcow2"
+			if [ -f "${crypt_file}" ]; then
+				crypt_map="${mapper}/${crypt_arg}"
+				crypt_mount="${mount_root}/${crypt_arg}"
+				local device
+				case "${action}" in
+				"${action_open}")
+					# find device
+					if ! device="$(rwx_crypt_device)"; then
+						rwx_log_error 4 "No device available"
+					fi
+					# make directory
+					if ! mkdir --parents "${RWX_CRYPT_VAR}"; then
+						rwx_log_error 5 "Making failure: ${RWX_CRYPT_VAR}"
+					fi
+					# record device
+					if ! rwx_file_write \
+						"${RWX_CRYPT_VAR}/${crypt_arg}" "${device}"; then
+						rwx_log_error 6 "Writing failure: ${device}"
+					fi
+					# connect device
+					if ! qemu-nbd --connect "${device}" "${crypt_file}"; then
+						rwx_log_error 7 "Connection failure: ${device}"
+					fi
+					# open device
+					if ! echo "${pass_phrase}" |
+						cryptsetup luksOpen "${device}" "${crypt_arg}"; then
+						rwx_log_error 8 "Opening failure: ${device}"
+					fi
+					# make mount directory
+					if ! mkdir --parents "${crypt_mount}"; then
+						rwx_log_error 9 "Making failure: ${crypt_mount}"
+					fi
+					# mount file system
+					if ! mount \
+						--options "autodefrag,compress-force=zstd" \
+						"${crypt_map}" "${crypt_mount}"; then
+						rwx_log_error 10 "Mounting failure: ${crypt_map}"
+					fi
+					;;
+				"${action_close}")
+					# unmount file system
+					if ! umount "${crypt_mount}"; then
+						rwx_log_error 4 "Unmounting failure: ${crypt_mount}"
+					fi
+					# remove mount directory
+					if ! rmdir "${crypt_mount}"; then
+						rwx_log_error 5 "Removal failure: ${crypt_mount}"
+					fi
+					# close device
+					if ! cryptsetup luksClose "${crypt_arg}"; then
+						rwx_log_error 6 "Closing failure: ${crypt_arg}"
+					fi
+					# load device
+					if ! device="$(cat "${RWX_CRYPT_VAR}/${crypt_arg}")"; then
+						rwx_log_error 7 "Loading failure: ${crypt_arg}"
+					fi
+					# disconnect device
+					if ! qemu-nbd --disconnect "${device}"; then
+						rwx_log_error 8 "Disconnection failure: ${device}"
+					fi
+					# remove record
+					if ! rm "${RWX_CRYPT_VAR}/${crypt_arg}"; then
+						rwx_log_error 9 "Removal failure: ${crypt_arg}"
+					fi
+					;;
+				*) ;;
+				esac
+			else
+				rwx_log_error 3 "Not a file: ${crypt_file}"
+			fi
+		done
+		;;
+	*)
+		rwx_log_info "Usage:"
+		rwx_log_info "${action_close}|${action_open}"
+		# TODO list
+		;;
+	esac
 }
diff --git a/sh/ffmpeg.sh b/sh/ffmpeg.sh
index bcb3a62..c32ad06 100644
--- a/sh/ffmpeg.sh
+++ b/sh/ffmpeg.sh
@@ -72,8 +72,9 @@ rwx_ffmpeg_input_hdmi() {
 	set -- \
 		-f "v4l2" \
 		-video_size "1920x1080" \
-		-framerate "60" \
-		-input_format "yuyv422" \
+		-framerate "120" \
+		-input_format "yuv420p" \
+		-pix_fmt "yuv420p" \
 		-i "${device}"
 	local argument
 	for argument in "${@}"; do echo "${argument}"; done
diff --git a/sh/fs.sh b/sh/fs.sh
index ac46f6d..0db5696 100644
--- a/sh/fs.sh
+++ b/sh/fs.sh
@@ -5,7 +5,7 @@ rwx_fs_make_btrfs() {
 	if [ -b "${device}" ]; then
 		set -- \
 			--force \
-			--checksum "sha256"
+			--checksum "blake2"
 		if [ -n "${label}" ]; then
 			set -- "${@}" \
 				--label "${label}"
diff --git a/sh/python.sh b/sh/python.sh
index 44ea181..59773c7 100644
--- a/sh/python.sh
+++ b/sh/python.sh
@@ -9,6 +9,6 @@
 rwx_python_venv() {
 	local path="${1}"
 	[ -d "${path}" ] || return 1
-	export VIRTUAL_ENV="${path}" && \
+	export VIRTUAL_ENV="${path}" &&
 		export PATH="${VIRTUAL_ENV}/bin:${PATH}"
 }