Actual vid is 1:11 seconds long
And more than half of it is black screen u wot m8
Anyway, you need to try to make your sync more evident. As it is you're just leaving your clip at more or less the same speed throughout, although I do see points that are synced it isn't very obvious
Black and white is interesting but it does get slightly boring. Something like
this has the same two colour concept but is more interesting by far
Keep making things, though, and I'm sure you'll get the hang of it soon enough