You can also keyframe the position and move the clip rapidly side to side, up and down, etc., and use CC RepeTile or Motion Tile to expand the edges of the clip so you don’t see the layer underneath – or black. It’s a noticeable repeated or mirrored edge, but if you’re moving the clip fast enough they won’t notice.
https://www.youtube.com/graphicsdump
https://www.myr3d.com