My comment after the spectator's video of the shot is released:
1. Although this is not a WPA sanctioned event (correct me if I'm wrong) this is essentially "the" current Straight Pool World Championship. Even though the background is a "warm" kind one, at least for the semi finals and final it should be considered (if possible) to have them in a more "isolated" atmosphere (no criticism to the people making a huge effort to keep this great game alive). Referees are hard to find (even on pay roll) and this in general is a problem in Pool. In this case the sitting player could ask the referee to watch the shot closely, he didn't (forgot maybe) so there were no perfect "referee conditions".
2. It is clear that the 2 ball is called, and we have to take it from commentators the 10ball was the one the shooter wanted to pocket (we have no clear view from this video, but it does look so).
3. It's hard to believe if a spectator's video captured the call on the 2 that the official equipment didn't (the final decision was based on that too), that is to be further examined.
4. It is clearly a foul, the sitting player could out of "sportsmanship" let it go, but on the other hand rules are rules and calling the right ball is part of them, so he can't be blamed for asking them to be applied properly.
5. The final decision, although a wrong one, should be respected after that, or an official protest should follow. No need to argue with the opponent, which also had the option to call the foul on himself but didn't (not necessarily because he wanted to cheat, it doesn't look so), anyway.
6. Not obvious why the winner didn't shake hands in the end, too much tension, maybe he didn't want to finish the match this way.
Points 5 and 6 from another relative video. The rest is history.