That’s an interesting clip Jerry. I would assume it came from some video that has a sound track that might help determine which shots and when. Also, what about the guy in the black shirt and red hat that is between the camera and Mr. Dutch, what he wounded also. It appears he either fell due to being hit or was taking cover. If taking cover, he reacted extremely quickly.
The ricochet strike on what seems to be the very top of the hand rail is at the moment of the first shot (Trump is still talking). But we can't say for sure if that first bullet deflected and went on to puncture the hydraulic line. Closest I've found to it happening from a witness account is this:
"The bullets rattled around the grandstand, one hit the speaker tower
tower and then chaos broke. We hit the ground and then the police
converged into the grandstands."
-- Chris Takach, Firefighter, Steubenville, Ohio
I would say the first shot probably caused the hydraulic line hit via a ricochet.
If the man in the red hat (he is not James Copenhaver) was hit, he left the scene without telling anyone. James Copenhaver had two wounds, on his arm and abdomen. Mr. Dutch was struck "once in the stomach and once in the liver", according to an online post. I can find nothing on whether the two wounded men had bullet puncture wounds or if bullets were recovered.