Add WEBM to --audio-format. It's the original downloaded file when using -x [audio-only]

[fx-pro]

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Description of your issue, suggested solution and other information

Currently, to download the best quality audio from youtube video, we simply use
youtube-dl -x ULR

The application download the webm file, then quickly "get out" the opus file from webm container and immediately delete original webm file.

However, the opus file isn't widely supported, I want to keep the webm file.

Of course, the application suggest using "-k" to keep that file. But when we use -k, the whole video file (which is 8-10x bigger) would be downloaded.

Please add one more option for this purpose (download audio-only as Webm), or simply add webm to --audio-format

Thank you

[dstftw]

webm is a container not a codec, it has nothing to do with --audio-format.

[fx-pro]

webm is a container not a codec, it has nothing to do with --audio-format.

@dstftw Ok then, so how can we keep the webm (audio only) file. It's actually downloaded, but it's impossible to keep?

@rg3 please ..

[dstftw]

Provide complete verbose log of what are you trying to execute.

[fx-pro]

Screenshot of execute with detailed highlight and explanation

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webm is a container not a codec, it has nothing to do with --audio-format.

@dstftw In addition, it's "--audio-format", not "--audio-codec". So literally, "webm", an audio file format, is still fit to that option, and it "host" only opus audio, so there will be no confused