Make your own video!!! It's quite fun!
My advice would be to pick a song with a nice beat. It looks really good when you match fat crits to a good song. I experimented with lyrical songs and didn't think it would be great for all audiences. Also, I synced crits with heavy bass notes in my last video.. It looked really good in my perspective, but not everyone has the same sound system I have. I would preview your video on a mobile phone before you release it, I think that might be the best way to judge song sync.
I do like your song selection. I would be very interested in seeing more, good quality videos. I plan to release a new video this Saturday or Sunday, maybe you could check my latest when I do!