Were you aware that there is a kaiser roll stamp for those who have trouble with forming a traditional shape the old-fashioned way?
I quite sure he uses the fold technique for kaiser rolls.I have used it before, but it doesn't change the taste of the rolls, so I just roll a ball of dough then flatten with the heal of my hand and let them rise. Much less labor involved.If you read George Greenstein's book, "Secrets of a Jewish Baker", he explains how to make Kaiser rolls without the stamp. There is a trick to doing it well and he describes it.