Re: YouTube: Noro sensei's jo kata
I'm not a student of his but at a seminar once Shoji Nishio Sensei explained that he had had to develop some of the koshi nage techniques in aikido himself because most of the other students of O Sensei did not have a judo background. Those resulting techniques descended from judo would usually have a hip twist and that's the way a lot of the younger shihan do koshi nage.
The older aikido style of koshi nage was lowering the hips and rolling an off-balance uke approximately over the beltline - usually but not always raising the hips to throw. That's the way Arikawa Sensei did it and looking at old movies I think the way O Sensei did it.
Some of the hoplology experts probably know more. That's my personal experience.