not exactly (but you wouldn't be far off)
as Tori pulling then turning and squatting with the right timing so Uke is pulled forward enough so that when your hips come up they are going over your back into the roll, and as Uke maintaining enough stiffness (I guess) so that you are pulled and tilt over Tori in a seesaw fashion then relax into the roll. every time I did this before I ended up going off the side into a heap as uke and would fall over sometimes backwards before completing the throw while in the squat or roll with them too instead of keeping control of their arm. ideally should be able to do the throw as Tori and pull Uke back onto their feet, control maintained throughout the exercise. I haven't seen this corrected as such, how would I say, newish judoka fall into two camps when doing the standard seoi nage: going over the back, or sliding off the side. things like drop seoi nage more popular is having time a uke to avoid it or at least avoid going onto the back for the ippon.
Hiroshi Katanishi - perfezionamento di seoi nage 2 - YouTube