Hello! MAKE SURE to try a free sample first! --- NOTICE! On iOS17 MP4 video files can be applied on a Lock screen. On Android you can use MP4 video files on both, Lock screen and Home screen ( make sure to try a free demo first! ) --- *iPhone users, here is a short video tutorial on how to apply MP4 video files on a Lock screen - youtube.com/watch?v=3MWoHz3jFbI