It is best to use your left hand and place the handle in your palm, not wrapping your fingers around it. A good practice would be to grab the left front fender with your right hand. If the engine should backfire it will break your arm!
This guy has no clue how to start a model. Mine starts on the first or second crank on either magneto or battery. His turning the crank to the point where he’s pushing down is a sign he’s ready to break his wrist …