And I'll put it this way...if I was those guys on those videos...I wouldn't post anything...ever.
It's not the fact that they're stationary per say, or that they have trouble speaking English, or that they are out of shape, can't punch, don't practice in a manner conducive to actual combat, have poor fighting posture...oh...wait....yes it is.
Carry on then.
"I don't know if anyone is known with the art of "sitting on your couch" here, but in my eyes it is also to be a martial art.
It is the art of avoiding dangerous situations. It helps you to avoid a dangerous situation by not actually being there. So lets say there is a dangerous situation going on somewhere other than your couch. You are safely seated on your couch so you have in a nutshell "difused" the situation."