Whomever that is in the video, he's living dangerously. Pushing down on a crank is an open invitation to getting a broken wrist, jaw, or worse if the engine happens to kick back. When I was learning to use a hand crank, my mentors were adamant about pulling UP on the crank, with all my fingers and my thumb wrapped around the same side of the handle so if a kickback happens, the fingers straighten out without injuring anything.
Pull up with a quick 1/2 turn, and if the engine doesn't fire off, do it again. Don't grab the crank handle in a death grip, and definitely don't push it down!
Jerry
