> Sony claimed the Protected Work was *theirs*
That's the problem: Sony didn't claim anything. It was just some pattern matcher whithin the bowels of Google. Oops.
On the Sintel video from the BlenderFoundation account on YouTube:
This video contains content from Sony Pictures Movies & Shows, who has blocked it on copyright grounds.
That is an explicit claim associated with Sony Pictures Movies & Shows. To get that, Sony had to upload content to the YouTube content system saying "I own this content. Anyone matching it is in copyright violation."
Also, the content ID system does not support Creative Commons or similar license usage (can use with attribution, can/cannot monetize the content, etc.) and does not work with collaboration/team events on multiplayer games, podcasts or discussions.