Make a 3 to 5 second freeze frame of the part of the video you want to use…drop it in motion then double the layer and using the biezer tool garbage matte the person or main object on layer 2 after you cut out your person any video you put above layer 2 will cover up the person garbaged matted any clips you put between layer 1 and 2 will be behind the person garbaged matted. Experiment with differnt color effects textures and motion to get the look you want..good luck