Here's a simple composite project started from your TonalWalk footage. I had to try this twice for it to work, I don't know what i did wrong the first time.
SimpleCompositeProject.mov
In my first test, the "Percentage" value seemed not to work. that will have to be investigated further.
I just noticed you are in v15. It should work the same, but i did this in v17. Let me know if it doesn't.
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