I've just updated this post. The videos I thought had been removed are still there: I posted the wrong link. As I said, they aren't the best videos, but altogether they give a good view of a very enjoyable milonga.
& a friend has just sent me this link to a series of videos of the Lo de Celia milonga posted by EQZ tango DJ, with posts of some excellent music too. This started at the beginning of the year, and is ongoing.
So now we know how people dance in Buenos Aires!