Several variants of a blurry video have been shared on social media. They show a group of men in camouflage patterned t-shirts walking down a pedestrian street. One such video is described as:
In fact the video is not in Berlin, it's in the town of Hanau near Frankfurt (they are marching past the WMF store on Rosenstraße). The men marching are members of Bahoz, which is a Kurdish "rocker" gang (the equivalent of a US biker gang, like the Hells Angels). They were marching as part of show of strength, however it was just against another local gang, Osmanen Germania (Ottoman Germany). Neither group promotes any kind of muslim ideology.