For the curious netflix has shared AVIF format images http://download.opencontent.netflix.com/?prefix=AV1/Chimera/...

Here are some supporting implementations: https://github.com/AOMediaCodec/av1-avif/wiki#demuxers--play...

If you want to check how it looks like on supported browser: https://kagami.github.io/avif.js/

I was also digging around and as OP mentioned found it interesting topic.