Enhancement request: add option to ignore WebM (or add "bestmp4", "bestwebm", etc. format names)

[zmwangx]

Most of the time bestvideo on YouTube is H.264 video in MPEG-4 container, but occasionally bestvideo is VP9 video in WebM container, and this has been screwing me on every encounter. Problems:

• WebM container doesn't support AAC (only Opus and Ogg Vorbis are supported), so when bestvideo is WebM, bestvideo+bestaudio always fails since youtube-dl asks FFmpeg to mux VP9 and AAC into a WebM container, and it simply can't.
• I'm not interested in VP9 in general, since it's not supported on iOS. I can afford larger files with H.264.

Therefore, I would like to be able to ignore WebM altogether. I think a good idea would be to add special format codes bestmp4, bestwebm, etc. so that the user can target the specific format they want, without resorting to doing youtube-dl -F first and filtering the results manually.

[phihag]

You can simply use -f "bestvideo[ext=mp4]" already. I do not see the need to add any more codes.

Also bear in mind that bestvideo is not the same as best. It will pick the best video-only format.

[zmwangx]

Uh apparently filtering by properties was implemented only a month ago in 083c9df and I didn't read the updated docs. Sorry.