One of the main differences between the Helo's in the Vid's doing rolls and the UH-1 is the Helo's in the Vids have Pressurized Hydraulics including the reservoir, I do not believe the UH-1 has a pressurized system like the H53 has.
The other factor affecting real life is once you stressed the airframe to that point it would be good for nothing but static display.
The H53 you see in the video was an A model marine bird pulled right from the flight line. After the aerobatics the airframe was retired because of being over stressed at Main GB bolting points and center frame section.
It was used for Training... we use to call it "Alfie"