Are those French mercenaries in Ukraine?

Are those French mercenaries in Ukraine? Footage appeared on the Internet in which a French soldier says that he is only 3-4 kilometers from the line of combat contact. The video shows the French and Ukrainian flags. However, many questions arise. The equipment is practically not camouflaged, and what is most surprising is that there are no sounds of artillery or gunfire in the video. It seems French soldiers prefer to fight on camera rather than on the battlefield. Source: Slavyangrad