I always think there's not a lot to take from what a player/coach displays in public. You never know what's going on behind the scenes. Scotty Bowman was about the coolest customer you can imagine when the cameras were on, but there are players who STILL hate him for the way he treated them behind the scenes (Aaron Ward, Bob Errey). In some cases, even guys who won multiple cups with him hate him. He was apparently downright vicious with Slava Kozlov, and, according to Pierre McGuire, the catalyst for Steve Yzerman becoming a two-way monster was Bowman shaming him for being a selfish player in front of the lockerroom. But you'd never know that from anything that ever got caught on camera.
So, with Cooper's public face, I just don't read much into it. The guy is trained as a lawyer, so he's making calculated statements. I think it's a lot more fair to judge him by patterns we see on the ice than anything he says in front of a camera.
I still haven't been able to see the video, but from what I can tell, the players got caught in a candid moment. It's kind of cringe-worthy, but I really doubt it's all that uncommon for guys to goof on their own team like this. It probably happens a lot, when you put 6 or 7 guys on a bad team together, when they don't think there's a camera on them. I mean, real life guys with real life personalities and senses of humor, what are they going to talk about? Hope for the future? I think sometimes we expect guys to be robots behind the scenes. That said, I still haven't seen it, so it might be worse than I'm thinking.