Hook

Their other posts in the index, biggest breakout first.
Editing, while I was editing, I noticed that if I put three clips together, they look very flat. There's no impact in them. So, duplicate the first clip and place it as an overlay. Add a keyframe at the beginning of the overlay. Select mirror mask, adjust it to 50 to 55 degrees and place it at the top left corner. Go to the end of the clip. Drag the mask to the bottom right corner. The second keyframe will be added automatically. Add another black background as an overlay. Invert the mirror mask, adjust it to 50 to 55 degrees and place it at the top left corner. Go to the end of the clip. Drag the mask to the bottom right corner. The second keyframe will be added automatically. Now, select the video clip, go to layers, and send this overlay to the back. Place the video clip to the front, as we did before. Congratulations, you have learned to create this slide screen effect. Repeat the same process for the other clips to save time. Duplicate the clips and replace them with the original clips.