So, I was making a video for my Youtube channel. I'm gonna try to explain this as good as I can, sorry if I don't. I had made a song, and I was in the process of putting a tiny clip of a video to each note in the song. It's a fast paced song and I used aproximately 2 hours to do 75% of the song, so a lot of tiny videos everywhere. Then when I was about to scroll down to the end of the song to work on it, my all my tiny videos got corrupted, but I know how to fix it by save it as a .wlmp, then it should be ok again. But no... The videos was completely out of sync with the song, it looked terrible. 

So I'm wondering, will these files be out of sync forever? Or is it a way to fix it? I really don't want to spend another 2-3 hours making it again. Thanks for your answers!