Famous IP friendly video and audio generation for noobs?

Hey! I have been looking around but I don't seem to find precisely what I'm looking for, so: I'm trying to make a fan edit of some famous content. I want to fix some scenes and dialogue but I'm a complete noob with AI, I have seen very well done memes of famous characters and people with voice and detail and good continuity. I want to use it for as little as possible (scenes I can't recreate myself with film or editing) so probably shots shorter than a minute.