I'm afraid I cannot agree with your interpretation of these events.
While Master Windu may, indeed, have survived his betrayal at the hands of Skywalker, he was the battlemaster of the Jedi Order.
I am fairly certain that Lord Vader was never his equal in combat.
It was only with Palpatine there as well that Windu was initially defeated.
The video was well done. I will give credit for that
FYI, he wasn't the Battlemaster, although he was one of the most skilled swordsmen of the Order. The title of Battlemaster belonged to Cin Drallig, at the time. IMO, Windu was the superior swordsman, but Drallig was known as an excellent teacher.
Just a little correction