@j @Humpleupagus @Noraweed @TeaTootler @bajax @lanodan I don't usually watch these in a browser; I'm a weird case.

But if you are asking, my vote is always "broadest open-source and hardware support, older is usually better, and every codec Google touches is suspect, especially with after all the WebP/vp9 bullshit".
xz_meme_formats.png