Not sure about that review.
Gif1: Textbook blocking where he helps with the RT and then kicks over to get the LB and the RB follows behind him. This is a play the Cowboys use often.
Gif2: Reverse of Gif1. He helps the Center and then kicks out the LB. The RB follows behind him but the Center can hold his block.
Gif3: He is one on one against a pass rushing DT and keeps him at the line of scrimmage.
Gif4: Pass rush where Cooper is one on one with All-Pro Geno Atkins. Cooper takes 1 step backward and holds his ground.
Gif5: I wondered if that was a busted assignment but I can't say for certain. The RT didn't need help and they also had a TE come across to the same area to to help if needed. In most similar situations Cooper often helped the Center initially and then got back to help the RT.
Gif6: He falls down on what appears to be a partially snow covered field. Notice how #74 busts his butt also. His primary assignment was to make certain that the defender #94 didn't get to the left (offensive right) which he didn't.
Summary: He might have had a busted assignment in Gif5; otherwise he was between OK and very good in the other Gifs.