diff --git a/rwx/sw/ytdlp/__init__.py b/rwx/sw/ytdlp/__init__.py
index 68ea71a..41750aa 100644
--- a/rwx/sw/ytdlp/__init__.py
+++ b/rwx/sw/ytdlp/__init__.py
@@ -10,6 +10,7 @@ from rwx import Object
 from rwx.fs import read_file_yaml
 from rwx.log import stream as log
 
+EXT = "webm"
 TIMESTAMP = "%Y%m%d%H%M%S"
 URL = "https://youtube.com"
 
@@ -128,7 +129,7 @@ def download_video(video_id: str | None) -> None:
     if video_id:
         ytdl(
             {
-                "format": "bestvideo[ext=webm]+bestaudio[ext=webm]",
+                "format": "+".join([f"best{av}[ext={EXT}]" for av in ["video", "audio"]]),
                 "outtmpl": "%(id)s.%(ext)s",
                 "postprocessors": [
                     {