"It was crazy. This year was different," said Mr Kopke, who publishes content to his 366,000 subscribers under the name Tooleko. "I shut off my brain and went for it.
"All the people at the top said they were going to steal my title, but this is mine.
"I worked for this. I risked my life for this. It's my cheese – back to back."
One spectator from Mr Kopke's race was taken to hospital from the event, which the local authorities say is dangerous and puts a strain on the county's ambulance service.
Thousands of people watched the races from the side, top and bottom of Cooper's Hill.
The second men's race was won by Luke Preece, from Gloucester, who flew down the hill race dressed in a Superman costume.
"I am absolutely buzzed, amazing… the adrenaline," he said afterwards.
"My dad did it, I can't believe it, it's amazing."
