All options under the "options using ffmeg" title require the ffmpeg library.
Include the ffmpeg executable (renamed to ffmpeg, example ffmpeg.exe)
in the same directory as yt-dlp, or install it with apt, etc.
Generate command
Remux Options
Remux this video to a different format
Format
Extract Audio Options
Extract audio from the video to a different format
Format
Warning
The selected options require you to have ffmpeg installed, and yt-dlp
will output an error if ffmpeg is not found.