I don't see any evidence of "hurting people for no reason" in that video. Do you see the large, unbroken, glass windows on both sides of the street?

The vast majority of the protesting is now peaceful. The protestors quickly realized the breaking and looting was working against them in the media, and in court cases around protest bans.

Here is an article from the BBC on Thursday's protests. They were the largest so far, until yesterday. The BBC only found a few small examples of breaking: https://www.bbc.co.uk/news/articles/ckx2qzv835pgo

Source: I live in Montpellier. I've been in the peaceful marches and walked through the tear gas, photographing.