Hey Fobos!
Indeed your amv is not that bad, you tried something new for you and it's a good thing. In my opinion the main flaws of your amv are the followings ones : a lot of your masks transitions feel too rough and be careful with the change of color from one scene to another, sometimes it was too different! Don't hesitate to use color correction to improve the consistency of your amv!
Good luck for the next one!