The lip syncing was fine...but...
The lip syncing was fine...but...YOU KILLED RINKU SAMA!!!
I'm sorry, but I can't watch this video anymore now...
Here, I'll leave some helpful hints:
make a set of mouth shapes for specific sounds like OOOOO, AAAAAA, etc. to put into place where they belong.
also, don't show so many blank spaces. the audio was going but i didn't see anything. this looks really bad, unless its used as an effect for something like the person being in a really dark place.