@ShadowJonathan@tech.lgbt Ah, no, it's not fully self-contained. I don't think that you'll find such a format with browser support - as every time you wanted to watch a video, you'd have to transfer every version of a video including the ones you're not using, which could easily 5x the filesize. So I don't think browsers would have a reason to support such a thing, them being primarily network-oriented.