Mase then heads towards the studio where Puff is, I tell my camera man to follow him and he straight De-bo’s the interview LIVE ON AIR (pay attention to Puff’s face, when he walks in). He’s gone for a while, then he comes back out with the letter like, I told you! I’m FREE!!!!
Full story

Update from Miss Info:
that signature wasn’t on a contract release form…it was basically an appearance release form. Basically, Diddy is allowing Mase to appear on songs with other artists. He is not freeing Mase from his contractual obligations to Bad Boy.

Props ShuddUpKim(Explanation of the video), spotted @Gyant Unplugged

Full interview @ Radio Big Boy