I'm probably going to come off as an ass here, but I think you are letting yourself down with this one. You have the audio part down. Good
performance. Video though is something beyond the sound. Except for the folks on music forums, who really cares that you have a spit screen and a condenser mic? Video is about acting, not playing and recording. Music Video calls for combining both.
Take the sound track and put it on a boom box (MP3 player with an amp?). Play it while you record the video in different locations or scenarios. Shoot video with the camera and act! Then sync the sound with the video. Shoot your video from a few different angles/perspectives and mix the video in just like you would sound. It is acting so dress for the part - create an image. Don't hide behind the microphone. It isn't like you are ugly or anything.
Don't laugh too hard at my attempt here, but I think it shows what I'm talking about better than my explanation.
Winter's Night
Glen