Downloading WEBM Audio

[Teac23]

Hello

I would like to download lectures from YouTube but some can be 2,3,4 hours long so the size is quite big. However there is an option where i can download a Webm audio files which is just the audio and are much smaller. Having tried using Firefox add-ons, it take's forever to download a small % of a Webm audio file and it always fail's everytime. Is there a software, and a way to download a Webm file faster?

Thanks

[sneaker]

youtube-dl?

youtube-dl -f "bestaudio[ext=webm]" "YOUTUBE_URL"

https://github.com/ytdl-org/youtube-dl/blob/master/README.md#format-selection

Yet i can download webm audio files that are much smaller.

Not sure I understand. If you can do that already, what exactly is your question?

[LZAA]

Url?

[KarMa]

Try https://www.h3xed.com/blogmedia/youtube-info.php

[Teac23]

Thanks for replies

Sorry sneaker, i have added and re-arranged the wording in post.