theres been so many threads on rugby vs football...scientific facts show that football hits are indeed harder, however the play feels much less because of the pads. rugby hits aren't as big, but they feel all of it
and in the video, 3 rules which some hits broke, no tackling above the shoulders, and no spear tackling (picking up and dropping on the head). you can pick them up and drop, just not upside down on their head. and the last would be late hits to the kicker. so most of those were legal.