@BuboScandiacus It doesn't slow it down, but it might be because it's a very small video & the computer is good. The computer has video decoding hardware for the video format I'm using, so that might be reducing resource usage more. The wallpaper also supports automatically pausing the video under certain conditions to free resources, such as low battery or a window being fullscreen. I haven't tried this on a worse computer. It should only slow down the computer if it uses the CPU to decode the video, which happens if your graphics hardware doesn't support the format, or if the file is large & consumes alot of memory. I transcoded the video to AV1 because my graphics card can understand that format & because videos in that format have a very small file size. It's probably best to try out different things & see which one slows down your computer the least.