Firefox and chromium (two out of three big web engines) use ffmpeg so billions use every day, for sure. In chrome though they disabled the obscure codecs.

I thought this was something that they already patched. Good on Google this time

I think the Twitter account is also fake. He said he isn’t on any social media

https://www.republicworld.com/technology-news/social-media-news/linux-founder-linus-torvalds-thinks-facebook-twitter-and-instagram-are-a-disease.html