[alanwong]

It's largely translated from a Chinese social media post [1] that's been floating around without clear attribution.

[1] https://twitter.com/syhily/status/1517868079648104449

[AustrianChina]

Yes, this is the source.

[yorwba]

I think it's better to treat that post as part of the protest (someone supporting the message of the video imagining how it spreads far and wide) than as a reliable source on things like traffic figures (which, realistically, even the authorities can't know because of all the different copies floating around).