I think its totally harmless if uke is relaxed, and there is not much pressure in the elbow.
There were others who threw even worse. Uke had to jump high to prevent fractures.
Tissiers way of throwing has more a leading charakter, it's actually soft.
You may we ll be right Tissier Senseis waza might be soft.Then again how do you define soft?Not only that some person watching Tissier Sensei might not be so soft in an application.I still say the vid shows potential for elbow damage.Ony art 2.51 approx does he do a Shiho Nage which I think is safe .Most of the others are elbow breakers.Why do you think Uke jumps? Cheers, Joe.