In the You me at six video for Reckless the drummer is wearing a t-shirt with a Union Jack totenkopf (a symbol of the Queen's Royal Lancers).
Not sure if this is from the Down but not out clothing range or the Cheer up! clothing range (both companies owned by members of the band).
Or perhaps it is from neither, but was just any old thing he happened to put on that morning.
The music is the look, the look is the style, the style is made up of the clothes, the tattoos, the attitude.
The video is directed by Tom Barnes (includes lots of serious pointing).
Later the drummer takes the shirt off, so it is not all sales promotion.