When it comes to the Marvel part at least, I'm pretty sure he did just take it. It's understandable though, I haven't even gotten to try the game once, much less record myself doing it :(
I understand the intent of doing it as just a preview of what's to come, but at the same time he's showing a piece of somebody else's combo video and kind of trying to pass it off as his own without crediting that individual. But whatever.
I wasn't initially interested until I saw Marvel 3 stuff. I'll definitely check it out in a week or so.