I would suggest using one tune as the back track, instead of switching to different ones (Find your best bass recording to show off). The various clips of different videos you've done so far are a good idea, just perhaps have more, and make them change to the tempo of the music in the background. I don't think many people are going to want to see so many different links on the video (Leave out the subscribe link until the end), but leave the ones at the end.
The 4 second intro can be shortened to the first 2 seconds, and the long image at the end is 25 seconds long... way too much. Try a maximum of 10 seconds to keep things short and simple.
Those are my opinions on what could be done differently.