Cool idea.

I was just thinking that ideally, each person should get at least three consecutive frames to work on at a time rather than just a single frame. Often there are things that look like dirt on a single frame, and it is only when you go backward and forward that you realize it is actually part of the shot. This will prevent things from disappearing and reappearing. It will also allow people to copy pixels from nearby frames to do a temporal fix rather than just cloning nearby pixels to make a spacial fix.