IMO, the win-win situation for YouTube, YouTube content creators, and copyright holders is for Google to simply make the DMCA claim/counter-claim system as streamlined as possible. The DMCA lets YouTube not give a shit after a counter claim gets made, because they've earned their immunity. Someone who makes a living uploading stuff to YouTube have a professional interest in making sure their content remains up, so they'll respond with the appropriate "your claim is bad, if you disagree sue me" counter-claim quickly. And for copyright holders, getting a reputation for successfully suing infringers will rapidly serve to chill people's abuse of their material.