I am very suspicious that this was staged.
The only evidence against it is a report on Fox 5 Vegas, where indeed the police said that they apprehended the two suspects 15 minutes later:
https://www.fox5vegas.com/news/crime...6a8f43fcd.html
But notice he gets confronted right away by two black guys right after talking about fighting multiple black guys at once, and then he oddly keeps taunting them with "nigga" despite getting stabbed and having no weapon of his own. It's also not clear why these guys gave him his phone and battery pack back before leaving.
I guess it's possible this was real, but something's really fishy here.