I have a couple of suggestions to help IR.
1. Set a time limit like 30 or 45 seconds for the ref to watch video. After that, screen cuts off and the call is upheld.
2. the replay ref can only slow it down to 1/3 speed.
3. change the rule of where the football is spotted to where after a knee or whatever it hits, it's where the football hits the ground.
#3 gets rid of all the BS of where was the football when his knee went down.