At full speed it looked like a no arms shoulder charge and I can see a Yellow being possible.
But having seen the replay, and assuming (not always true) that the referee was seeing what we saw, then there 'was' an attempt to wrap the arms and it's not even a penalty.
Very strange decision, but as I say, we can't be sure the referee saw the reverse angle that we did.
Phil. The referee sees what we see (on SkyTV broadcasts in NZ, what is played back on TV is what the referee sees on the stadium screen). Also, at 1:10 on the video, you hear the referee say
"he's got to make sure he comes down alright". This tells me that Black 11 was YC for a tip tackle, and clearly, this was not a tip tackle.
I expect the YC to be overturned post match, but the decision has IMO cost Black the game. Instead of a line-out to Black near halfway, it ended up as a PK and line-out throw-in to Green further up field, and from the resulting PK from that play, Marty Banks kicked the winning penalty goal for Green.
If that is not a critical error, then its very close to one.