The fact of the matter is these two players chose to take part in things that are not in line with living the lifestyle of an Iowa football player, as the staff sees it. Robinson had the opportunity to return to the program after serving basically an academic suspension for the Insight. He chose to be in a car that had weed present the night before the bowl game, and got popped. Not a great choice. DJK made some horrible choices, too, and was removed from the program.
It's not surprising that they didn't appear in a highlight reel put together by the Iowa Football Video editor, nor do I find that to be extreme.