Air quality can certainly be impacted by density, but neighbourhoods that aren't car dependent promote exercise by giving people the ability to lak or bike wehn going out instead of driving (which can also help the overall air quality).
I think this could be stemming from another creator's jokes.
Her name is "CitiesbyDiana". I believe she started doing Cities Skylines and Truck Simulator content but that transformed over time into talking about urbanism in real life. She makes short-form videos that are hyper-edited "brainrot" and usually have AI voices. Either celebrities like Trump and Biden or OC characters like "Lane Man"- a prodigy of Robert Moses who advocates for paving the entire world with highways.
She's also moved to to other things. If you've seen memes about food or pharmaceutical grade glycine from Dongua Jjnglong, it originated with her ironically simping for the company as a joke.
I've noticed she's started to use AI to manipulate videos from podcasts, including Talk Tuah. I haven't seen this particular one video, but this seems right in line with the kind of content she creates.
Glad to see another Diana enjoyer. Her videos are the perfect satire of brainrot. It's so niche and I haven't found anyone else who enjoys it. Even my wife who is honestly as chronically online as me and used to watch all manner of stupid montage parodies and stuff back in the day doesn't enjoy her content.