Back to video review, I really don't see a viable option for it. You would need a camera in each corner to try to get the best viewpoint, but even then it could be tough. What about the other 8-10 officials that are waiting for their turn, on all four corners watching and able to get together to overturn or make a call that could be missed by the officials on the mat. Use them for a challenge of a review. Would they overturn each other? Would they stick together and "protect"? I don't feel any official tries to throw a match. They have to make a split second call, and be willing to defend that call. If other officials saw it differently or had the right angle, they could overturn it. Just a thought. Then again, why not have 10 officials on the mat to watch from every angle.