I'm working on a video for one of my high school assemblies, and I've got a great idea, but don't know quite how to achieve it. I want to feature every single senior student in the school for one of the scenes in the video that will last about 20 seconds. It will start with one clip of our student body president, then show 4 or so students at once on a grid, then it will slowly start zooming out to show the entire student body on a large grid, we're talking 300ish different video clips. I've got all the different videos ready to go, just can't seem to put them together. I've seen this before in commercials and I'm sure you have too. I just don't know what video editing program could do this and how I would do it. I've tried searching for tutorials, etc but no luck. I have FCPX as well as AfterEffects. My machine of choice is the new rMBP so RAM and power is not a problem. I appreciate and welcome any answers.