YouTubes Content ID system appears to have caught on in a big way.

This afternoon, a senior product manager stated that over 1,000 content owners now make use of it, and that theyve provided more than 1 million reference files containing about 100,000 hours worth of material.Content ID is something that, by automatically identifying copyrighted content on YouTube, is supposed to save rights holders the trouble of saying hey, that videos ours every 3.7 seconds. It was problematic for a while, since it wasnt thorough enough to satisfy the owners and led to far too many takedowns for YouTube users tastes.