That video clip was from Fox, not real clear politics.
Krauthammer doesn’t venture far away from Fox because he’s virtually an employee at Fox.
He is a paid political "contributor" and "analyst". So are Kirsten Powers, Juan Williams, George Will, et al.
Hell, if you google it you can see that sometimes the guests being interviewed are paid.
I don't care what you think about Krauthammer's rhetoric. But I believe Krauthammer sticks to commentary on Fox shows because it's a "one stop" destination. The man is a quadriplegic. I've often thought it has to be incredibly difficult to consistently make it to one place, day in and day out. On a personal level, I admire him for his "keep going" tenacity.