Watching your AMV was actually very helpful in knowing what sort of advice to give you. Overall, I am honestly quite impressed, a lot of thought and effort went into that AMV and it definitely showed. Unfortunately, your effort was marred by a number of little things that were the fault of your instruments not you; to make a simple analogy you are trying to make a detailed sketch with a thick marker. For example, you get a lot of what I refer to as "vestige scenes", places where the scene switched for just a frame or two but your editing program was too clunky to notice. On better editing software that's really easy to fix but on WMM fixing that is really just a nightmare...
I am more than happy to give you lots of individualized advice, but I think it would be better to wait until you've made your first AMV that isn't with WMM. A lot of your problems will just go away once you do that... I feel like you could be making competitive AMVs very soon with just a little effort. Go back to the guide (http://www.animemusicvideos.org/guides/avtech3/index.html), skip the theory guides unless you feel like reading them, and just follow his instructions. If you run into any problems (I did when I was just starting out) let me know and I can try to troubleshoot...Edit: Okay, I've now actually read the whole thread multiple times, watched your AMV three times, and given this a lot of thought. I'm going to be honest here and I want you to know I really really don't want this to come across as harsh (I really do think your work shows evidence of a lot of talent): The Burst Angel AMV you linked us to is, more or less, an Action AMV, which wouldn't be an issue except that Action is a /very/ competitive category when it comes to specs. You might be able to make a Retro or a Trailer or one of the other categories (not Effects) with WMM, but you really are unlikely to even get shown with a WMM action AMV, whatever you do with it. The fact of the matter is, WMM's export quality is well, really bad. I would really hate to get your hopes up and I certainly could be wrong, but from my perspective it seems very unlikely to you find success with your current software...