really good, but could use tweaking
I appreciate the fact that you added a play and replay button. The skits are great, but you could use more different stuff. Try finding some really obscure but funny quotes and use them as well. I think your flashes really just need to be longer, so you can throw in some more stuff.
If I could help you understand why the lip-sync is perfect on some computers (my sister's laptop for instance) while not on others (my desktop mac at home), I would. I simply have no clue why it does that.
Tweak some stuff and you could be at least as good as the original.