You can’t sling them to the ground, you can’t use your body weight to drag them down. You can’t hit them high. You can’t hit them low. I just saw a thing on Facebook of the modern dogs of war pack, asotasi, mason, omeley, sonny, Reni etc. smashing the dragons for 80 mins.
Most of those tackles in the clip would have been penalised in today’s game. Player safety is paramount but the refs don’t even know what is what these days and if some is injured it must be from foul play. They don’t get that unintentional accidents happen too.