Start by adding your "source" video. This is usually a character or clip that will be "pitch-shifted" or rhythmicized. 2. Add the Scan Overlay (The UPD Layer) Search for "YTPMV Scan UPD" green screen assets. Place the scan asset as a over your main video. Use the Chroma Key tool to remove the green background.

In the world of YouTube Poops, a "scan" refers to a visual style where a thin line or bar moves across the screen, revealing or distorting the video in sync with the music.

Newer assets include "Slow Scan" and "Hyper Scan" variations to match different BPMs (Beats Per Minute).