Call me crazy (or rusty, it's been a loooooong time since I've been here

) but wouldn't a better option just be changing the opacity of the clip on video 1 and 2 instead? Considering that the default background for 0 opacity is black (as there's technically no input/output for a 0 opacity frame)?
Like I said, I could be wrong. I need to dust off the cobwebs and get back into the game, but I appear to have lost my muse
