OK, so the first minute or so of the video is just talking (and, sans Dominic Armato, what’s the point?), and the video itself is ten freakin’ minutes long; but if you skip around, you’ll get to see Guybrush Threepwood, Mighty Pirate, dual-wielding lightsabers, zapping things with Force Lightning, and expelling a gigantic sphere of pure destruction. In my fantasies, it’s considered canon. (Thanks to YouTube user feltoltok for posting the video.)
(Also, if you want to learn how to actually unlock Guybrush in Star Wars: The Force Unleashed II, Kotaku has you covered.)