Here's an archived article on the incident.

Here's that article not archived so you can watch the longer length video with the before and after.

Transcript and description of the footage, minus the video from OP (so basically from "I'm dead.... I'm dead" onwards):

[Store owner drags body round to the front of the shop nearish to the door]

Stabbed Guy: Please

[Store owner goes out back for a second (I think to grab his phone)]

Owner: Call 911.......... Call 911 (using Siri or something)

Stabbed Guy: Don't let me die, sir.

Phone: Calling Emergency Services

Stabbed Guy: I'm sorry. This wasn't my idea.

Owner, calmly but dismissively: Shut up.

Stabbed Guy: Please don't let me die.

Owner: [proceeds to talk to the emergency services]

The article quotes him as saying he just wanted the police and ambulance to arrive on time, but this guy had no respect for this piece of shit, and fucking good on him. The only thing I would say is that this is a good reason to have a firearm and to learn how to use it. Which is what is seems like he'll be doing. From the article:

Nguyen, who turns 23 on Saturday, said he is thankful that he survived the ordeal. He said the incident left him “shook” and he plans to look into arming himself with other weapons for protection.

“Small business owners like us, this is our livelihood,” Nguyen told The Post. “Not only are they threatening our lives, but our livelihood, so we have to stay vigilant.”

So not only do we have a case of a store owner defending his shop, but he also realises he got lucky and will therefore be looking to better defend his shop (most likely with a gun). The only thing that didn't work out was the other guy got away.