The Twitter feed for In These Times names the injured man in this video as "Two time Iraq War Veteran, Scott Olsen".
The YouTube information gives the date of the event as 10/25/2011 and links to http://www.ktvu.com/video/29587714/index.html as the original. We don't see in the video what blooded Olsen's face and evidently left him unable to get up and walk away. We do see the police very obviously prevent other protesters from coming to the aid of the wounded man, although other demonstrators eventually do carry him away.
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