Thats exactly how i did the start, though i was shown the sequence by the guy in that video. The trick is to smear your left foot in a vague groove down and left of the high right foothold to throw over for the pinch, then bring left foot up onto the good edge. There is a cheeky little undercut under the roof that helps slow your momentum when bringing your left hand out to the lip if you need it.
Hope that makes sense.
Chris