I mean, I'm not particularly offended by the video (though at the beginning it does take that 'toxic fandom' stance that I wish would disappear: stopping treating fans like rabid dogs is a good way to prevent them to act like ones), I'm just not too keen on this theory that others have made. I don't think MoM is Xehanort for that would be more than a plot twist or a retcon, it would destroy two characters and whatever they did or said beforehand.
I'm not gonna diss on them for making an effort, despite the effort's quality.