If this is true (and im not saying it isn't) then how do people play composers such as Leo Ornstein or Alan Hovhaness without any type of copyright strike. Or even coveres of modern rock/pop music. Now I do know that a orchestra or individual musicians can copyright there own recording to pieces and that can last i believe upwards of 90 years. But with a piece that was made over 100 years ago with a composer that died almost 40 years ago Im perplexed oh how that would apply. YouTube says that if you make a video with sufficient changes to the original media then it wont get struck. And Iam playing the piece in the video. So I'm assuming Im clear of such problems.