thank you nalem. the music will be of course non profit, just fun, but nobody cared about that i think. i have been more asking if someone knows about the rule, or how to say that, i have heard that you can use anything you want, just be under five seconds, if i am right. but just what i have in my head, may be just some hoax, but so far i know i can use five seconds of anything, without breaking any rule, but as i said, i have no backup for this so have been asking here ... thanks for the replies so far!
