Over at Jaycut, they’ve just opened their online editor for public beta testing. Right now, you can upload, edit, and export vids there, using their fairly basic online editor, for free, but you can’t save your session in the beta.
Still, last I checked in with Jaycut, you had to sign up with them and them download what I now realize was probably their alpha release. Trust me, it was not an intuitive process (even though what I just wrote sounds simple enough).
This is much better and suggests there will be an actually useful online editor available once again (and this one starts with “J” too!).