Let's say I have a video clip. I drag it on the timeline in the editor and add an image in the left up corner, I export the project and name it "Project1.mp4". Then, I do the same with "Project1.mp4", but I add a different picture in the left down corner and export it again. I do the same with other corners (please ignore the fact that I could just add all of the pictures in the corners at first and then export it once). Does the video quality fall?