Seems that they are going to mask the user IDs.
Viacom, YouTube agree to mask user data
YouTube will be allowed to mask important user information from records it must turn over to Viacom, Google said in a blog post Monday.
"Viacom and the other litigants have backed off their demand for YouTube user viewing histories," Google said in a statement. "We have reached agreement to anonymize the data."
http://news.cnet.com/8301-1023_3-998...?tag=nefd.lede