Seemed like it was going to be more complicated than it was.
I think you could have had mouse click advance the dialogue to make it a bit less tedious, we need the mouse for gameplay anyway.
Third level was a neat twist and it took me a moment to get it. There were times I tried to drag the video clip and instead of it going where I wanted, it went back to the footage folder. I think it'd be nice to be able to place a clip between two existing ones, like a real video editor.
Having to click each clip to view them is a bit tedious.
In the end, the only twist to the strategy was to intentionally run into the wall to "waste" a clip. I think you could do with more variety. Like maybe a level where you have to have as many leftover clips as possible. Or one where you can have unused clips but you get a bonus for using them all, so players have incentive to look for ways to use all clips instead of going straight for the goal?
Overall a pretty good puzzle game, just could use a little more polish