I'm a semi-noob to video editing and such.. and this may be a stupid question.. but how would you go about adding a video of yourself into an pre-existing video.. i'm not expecting it to look good or anything.. i'm just curious.. i have seen this in ameture videos.. i hope i'm being clear enough on what i'm asking.. i basicly want to take a video.. be it a clip from a video game or a movie and have myself in it..