This comment reminded me of Terry Davis, because that's exactly the kind of feature he would have deemed essential in a browser if he'd ever decided to add networking to TempleOS. RIP brother.

Videos really should be first-class entities, though.

Imagine an OS/browser-level ffmpeg implementation which would allow seamless copy/paste of videos, integrated snipping tools both for cropping and time, color adjustment, etc. with automatic imgur-style hosting of your newly edited video just a button-click away.