It is indeed TS.
About the song and some negative comments, it isn't about how badass it is, it's about the story it tells and the emotion it generates in the people watching it.
All in this walkout was perfect, the song, the timing of the camera cuts, the crowd reaction and the walk of Brandon, hyping himself up, being really emotional but at the same time focused, in control of the situation and in the moment, showing that his words "Estoy listo, estoy listo, soy el mejor" ("I'm ready, I'm ready, I'm the best" ) were true when he won. It was beautiful to watch, and I'm not even a Moreno fan or a mexican, although I will follow his carreer with great interest from now on.
I also loved the decision of Vettori to put "The ectasy of the gold" By Ennio Morricone, a great piece of italian cinema history, really dramatic and appropiate, but it was the only thing that stood out in that walkout, that is a perfect example of a good placed walkout song wasted, because the other elements of the Story were off: The crowd booed, facial expression of vettori was edgy and he was anxious in a bad way, he even tried to hug awkwardly the man who puts the vaseline ending in a headbut before entering the cage, which made me cringe hard.
This is my opinion anyway, for me is refreshing when somebody doesn't walkout with rap. I appreciate originality and a dramatic sense before "badassery"