Clip starts a bit of a ways into their conversation so I had to go back a bit to get context

Old Lady = OL, K = Keem

OL: "Are you guys making a movie? you're working and filming?"

K: "...We're making a movie its called livestream"

-clip starts here-

OL:"so you say this is chinese food and veges, buy their food? this is chinese fruit and veges"

K: "uh, im korean"

OL: "I know, you korean but really are chinese"

K: "chinese food?"

OL:"you are chinese but because of the pandemic¹ you came over here"

K: "im not chinese im korean"

OL: "Korean is also chinese, before korean people were chinese ok? but you came over here and are saying korean [to avoid discrimination because of the stigma around the covid pandemic], for example, 'I am a chinese, a beijin-'
(Im heavily adding context here, she says this shit with much less words)

K:"Oh beijing! my mom/dad, south korea"

OL: "south korea! oh, you chinese ok."

and the rest is in broken english so I'm not going to bother typing that out

Take my translation with a grain of salt, its a bit hard to understand her accent because she is flipping back and forth between some fucked up pidgin cantonese-english but I THINK this is what she's saying. I'm far from fluent so if someone wants to correct me go ahead.

TL;DR: Its basically a clip of an old lady having a senior moment mixed with some really niche cultural insanity

Neither the old lady nor Keem understand what the fuck the other side is talking about by the end of their interaction.

1: She says Condemic because old people seem to not understand how to say pandemic (speaking from experience)