How to Create GREAT Screen Replacements in After Effects with Brandon Baum | Adobe Video

Can you slow it down for us newbies?

Hey , whats up, thanks you for valuables video, please i want to replace a picture inside a box that's open and close in the video and when i replace it and play the video the replaced image move from it's place and didn't stay, if you can help me and and i'll appreciate your help, thanks in advance.

Hello i need help adding video to a still image of a television with a green screen but i cant find any video on this topic only adding video to video. I obviously want to add the video to play on the part of still image where green screen is in the still image