Copyrights

[Crazy Hand]

A while ago, I was wondering how video game music copyrights worked and I couldn't find any applicable information in the internet. Then I remembered, duh! I am a member of NSM! Someone here will probably know the answer!

So, I was wondering how using video game music copyright laws worked if I wanted to put them in a youtube video (or similar thing). Is it OK just to use them? Do you need to have a note at the bottom giving the copyright info? If not, is it OK to use an arrangement of the song in the video?

I was hoping someone would know, as you guys probably have to use this kind of stuff when making sheets.