Maedhros, what you quoted was not the actual document request (just an outline that the request was being made), the page after that lists the actual info being requested.
They list 9 document requests, #4 asks for identifying information on the people who have access to the video (which it seems was unlisted) and #5 specifically asks for the IP addresses of people who posted comments. It could easily be taken at a read that number #4 would include #5 (as a clarification of #4), since an IP address is an identifier on the internet and you'd have to have viewed the video to post it. It's the way I read it as well.
I dunno, I'm no lawyer, but I don't see anywhere sony will sue everyone who watched the video on the document. And Youtube don't have to give information of everyone anyway, if they gain the autorization they can only involve those who uploaded or hosted the video.
This is only what I think: If they did that (I doubt their lawyers are that stupid), a lot of people could only sue them back, because Youtube don't have the right to give information for anyone because they made a comment on a video. (Dunno about this, it's only my interpretation, like I've said, I'm no lawyer).
EDIT: Let me paste the part we're talking about here:
QUOTEJurisdictional discovery sought from third parties on an expedited basis includes, for example:
• Information from the content server host on the accessing and
downloading of circumvention devices from Hotz’s website.
• Information from Google concerning Hotz’s discussion of his circumvention
activities with others on his interactive blog.
• Information from PayPal on Hotz’s PayPal account regarding financial
benefits obtained by Hotz as a result of his illegal activity.
• Information from Twitter concerning Hotz’s communications with others via
Twitter regarding his efforts to bypass the TPMs in the PS3 System.
• Information from YouTube concerning the viewing of Hotz’s video entitled
“Jailbroken PS3 3.55 with Homebrew.”