DB - we are singing from the same hymn sheet here but I see very little right yaw before the loss of control - I think he has failed to anticipate the loss of ETL as he slows down and as the power comes in, the TR position just isn't enough to counter the MR Tq.
I know you have flown the 412 and it is noticeable on ours how, with a crosswind, it gives a nasty kick as you slow down to the hover as the fin loses effectiveness and the TR starts to take the anti-tq load - I just think the Bell 2 blade TRs often need more pedal than you would expect at low speeds.
I have been put in a 'reaching full left pedal' scenario at high DA in Cyprus in a Wessex and it looks just like the accident video here - fortunately I had height to take control and dive on speed where these guys didn't.
I would like to see their pre-flight performance planning