I've been looking around online at compatibility for HTML5 browser streaming. It looks like straight up AV1 in a MP4 container is becoming absolutely fine for browser playback on devices.

Is anyone using this on webpages yet? The sooner we move to AV1, the sooner we can have high quality video stored at smaller file sizes, which is a massive bonus.

Right now my company video hosting is purely in MP4 with H264, moov atom to the front as per the requirement, and it plays back on everything with no fallback in a straight HTML5 video container. What's the chance of switching to AV1 and not having to worry about the fallback for the most part?

Edit: I should have used a better title. I used FFMpeg for MP4 and AV1 creation/encoding. This is more about HTML5 video container code and direct AV1 file playback.