just watched the video and to me it looks like the Italian player comes in from the side of the ruck and not just just marginally, at about 90 degrees, I can't understand what the ref. is looking at, he was right next to the incident and yet he restarted with a scrum which implies no fault, the same with the O F no head contact, when it was obvious to everyone watching, there was.
I don't like knocking refs. but I'm lost for words on this one.