My problem is, whenever I crop or size and position a video I’m using as an overlay on top of another video, the area outside the overlay’s box shows up as black. I have a new version of Shotcut, so the compositing buttons aren’t there, and messing with the blend modes has been 0 help. How can I get it so the space outside the overlay box is just transparent?
Is V1 (or whatever you may have renamed it) hidden? That is usually the problem. Otherwise, please upload a screenshot.