It is annoying that a lot of Wikipedia pages still have sound samples in some crazy Ogg format that normal people’s browsers cannot play.
According to caniuse.com [1] all major browsers support ogg vorbis except for one: Safari.
And even that is limited to iOS, macOS Safari does support Vorbis (with some limitations). It is so widely supported that you would consider a JS decoder for the iOS polyfill.
Yeah, that's what Wikipedia do using this https://github.com/brion/ogv.js/