This is a fascinating video.
First, it is awesome to watch the sheer “don’t give an eff” attitude from the good guy. He is not going to stress about facing a pointed gun. I would love to know his backstory!
The other main takeaway is that this video is a great example of how bad guys, even armed with firearms, will continually move into contact or near contact range. Why? They have to in order to impose their will and take what they want. If they want property – a wallet, keys, a phone, etc., they have to physically grab it. It is rare for them to be able to tell a victim to put their goods down and walk away, and then the bad guy has time to move over and pick it up before leaving. That is not just not how crime works.
So there is no entangled fight here most likely because the citizen has zero idea of how to grapple and therefore decided not to. This is a huge reason we don’t see more entangled fights (and something critics of this never understand or realize), but it does not change the fact that if the good guy had decided to go hands on, it would have happened, because the bad guy, even with a long gun , voluntarily WENT TO CONTACT RANGE. Bad guys get close more often than not, period.