Hello, I am an avid user of split-screen, and I would love to make a fanmade version of the Parks and Recreation opening. But, I have to edit in black bars between clips, and keyframing is an absolute nightmare, as when I wanna zoom in on one clip, I also have to keyframe 4 other timelines the exact same way.
I did that a while ago, and yes, it was a LOT of work. Keyframing (is that a word ?) 3, and even 4 clips at the time almost drove me mad. But I survived. And I love the result.
So I second your request. Costs nothing to ask