I watched the Scotland-Australia rugby game on Sat and the use of going to the video referee was great.
Did not affect the flow of the game and ensured that the right decision is arrived at every time.
Also, the ref is mic'd up and can hear him speak to the video ref. For the red card, the ref pulls BOTH captains over and the offending player and explains why he is sending him off. No dissent whatsoever.
Simple, effective. How about it football?