By the look, he was shooting 2nd camera, not sure what lens that is, looks like a zoom. He is getting a wider or tighter shot of whatever the guy next to him is shooting on the other camera.
Its all the rage in the low budget video world at the mo, shooting on the stills cameras. You can put your 1.4 lens on and get a look for minmal$$ that you cannot get on a video camera at the same price point as your 5d.
Ultimately its all about the content, if the story is good you wont care what it looks like. But coming from a film background, I like 35mm film on a big screen. Its a beautiful thing when done right.