I have no idea what is going on in this video. Not only is the rotoscoping not done well at all, I don't even know what the story is. What is the box for? Why are they laughing? Also the guy never teaches the guy how to play guitar.
When rotoscoping you want the animation to be as smooth and precise as possible, and you want to remove the original clip that you are rotoscoping from. The audio is inexcusable because you can go in and fix the audio so it doesn't clip and sound awful. In order to have a good sounding quality video you record the audio separately from the video. Audacity is a free audio editing program that most people use when making anything that includes audio.
This sort of video wasn't excusable even in the early days of NewGrounds, so next time I recommend not taking only two days to make the video and invest at least a month into it so you come out with a quality video. Also take both advice and criticism from the animators here on NewGrounds like BrandyBuizel, because they know what the hell they're talking about.