PAYING FOR MUSIC????!!!!!

Ok, so all I freaking want to do is make a simple video, but no, its always crashing and freezing, and u have to PAY to add music???? All I simply want to do is merge a few videos, and add music, and there is no other app that works for me to do this....I need help!!!

Doesnt work on ipodtouch about Video Editor FREE, v2.1