1. Get rid of the Arial font, it looks awful. Use IMPACT or something similar.
2. The face transitions are not that good, instead make the change less obvious, maybe move the face out of the shot and then change it.
3. Your choice of music was spot on, remember never to just throw random stuff in; look around Youtube to find works that suite your video. Kevin Macleod/Incompetech is good for this, since his tracks aren't copyrighted and there is a variety to choose from.
NEVER USE COPYRIGHTED MUSIC, YOUTUBE WILL forget YOU HARD.
1. No problem. I was looking through fonts, but the thing with Vegas is that they show the name of the font, but not what the font looks like, so when it came to the font, it was mainly me being lazy. My apologies for that.
2. I try often to work out when I should make face switches. When it comes to spoken dialogue, as in my previous videos, it often works well, and it looks good. But I guess with no dialogue, like this, it doesn't really work well. Thanks for telling me that, I shall improve.
3. Thanks!