The video is of parishioners of St. Rita Church in Paris. As you may recall members of the church were forcibly removed after ignoring legal demolition orders for the building.
As best as I can gather, this group of parishioners decided to continue their protest by praying in the street. According to sources a man repeatedly walked by the prayer gathering playing music at loud volume on his cellphone. One of the parishioners grew fed up and turned his cheek.