I reserve making a judgement on this video, but there are a couple of things that are interesting around this Redguard thing in general. The trademark issued for the name some time ago puts it as plausible. On the other hand, as people have mentioned, it is amazing what one can do with photoshop.
I believe its fake. if you search Redguard on google pictures this redguard shows up
fc00.deviantart.net/fs71/i/2012/236/5/f/redguard_by_lupusmagus-d5c7zxj.jpg
from devianart :/ It looks like the redguard in the video. like someone searched redguard. took that picture and made a fancy dlc fake leak