Overlay Videos Without affecting Black background

[defaultls73gn6amppj]

Hi there, I'm making a video clip with multiple screens over a black background.

I'm trying to overlay a super 8 reel which only applies to the videos and not the black background (see photo). Any suggestions? Thanks!

[Ann Bens]

There are different ways to do this:

Add real to images.

Make black image with 3 holes and superimpose.

[defaultls73gn6amppj]

Ah yeah thanks Ann.

I'm at the point where I've realised too late that I should've added the reel to all the clips before I started. There are too many cuts in the clip to make an image with holes. Very new to premiere and learning on the go so I'm kinda just wondering if there's a last minute solution I guess.