Is there a reason you chose to run to the front rather than to come alongside the buoy, grab it, and let the boat drift back downwind? I thought that was your plan at first as you passed that first buoy. I'm new to sailing and I'm trying to figure out the simplest way to do this singlehanded as I will have to get my boat in a very packed mooring. Really helpful video anyway - shows how quick you have to be on your feet to get up there and grab it!
Picking up alongside is also possible, and I have used that technique, but you have to be aware of running over the pickup buoy and wrapping it around the prop (unless you make the final approach in neutral or sail onto the mooring)