[windsurfer]

HEVC isn't widely supported by web browsers: https://caniuse.com/hevc

AV1 is supported by almost all web browsers: https://caniuse.com/av1

[frakkingcylons]

Notable exceptions are Safari and Safari on iOS (unless you have an iPhone 15 Pro).

[alwillis]

Or an M3 Mac.

[threeseed]

Most of those browsers are just skins over the Chromium engine.

And iOS Safari is arguably the most important browser at all since iPhones are disproportionally used amongst video content creators.