So I have said this earlier, but I love watching Adobe After Effects tutorials, and recreating them in blender. But I have this problem that has happened in a few tutorials now. Its where people use the Time Displacement Modifier. It looks like a really handy modifier, and I am almost certain that it can be recreated for blender. The question I have is: Does an addon already exist? or do I/we need to make it so? Thanks for your help!
EDIT: For those who don't know what time displacement does, watch this video: https://www.youtube.com/watch?v=YCZ3MqXOfYQ