In video editing, you can use this picture overlay effect to insert an additional video (such as a webcam video) into the main video, just like you see in many online tutorials.Īpart from video overlay, you may also need to composite pictures, images, logos, titles and other visual to the video. If your TV has this Picture in Picture feature, it means you can play a video game and keep watching your favorite TV show, or enjoy two sports games simultaneously. Video Overlay, also called Picture in Picture effect, is referred to two video clips share the same display screen at the same time with one smaller video/image superimposed on a larger video.