Embedding logo in animated graphic doesn't work

I have tried PNG as a circle, I have tried JPG, and all I get in my video is blank white where the icon should be.

It DOES respond when I put a jpg, the cutout is square.

When I put in a rounded graphic with a transparent PNG background, the overlay is rounded.

So it SEES the graphic, and is representing SOMETHING with the white square- just not my actual icon.