This shooting is from Campo de' Fiori, the very popular (even too much) square in the center of Rome, Italy.
Campo de' Fiori is always very busy - 7 days and nights a week.
It all starts at around 5am with the food market taking over the entire square, and getting busier and busier like food markets do, until 2pm circa.
Street cleaning comes in and cleans the square, so that the square (and the entire area) gets now packed with shopping crowds until 8pm (shopping takes place in the morning, too).
Starting from 6pm circa, is "aperitivo" time. All the bars get crowded, as well as the restaurants, that generally stay open serving food until around midnight / 1am (some even later). Bars keep serving booze until 2am, while some clubs keep kicking until 4am or so.
3am is also the time when the second round of street cleaning arrives to clean up all the mess you see in this video, so that the market guys come in everything is nice and clean.
