Costumes and behaviour or Hardcore bands.

To fit in with the genre, the actors in the video won't have to wear a specific type of clothing as hardcore bands are normally 'DIY' bands, meaning they don't have a look, they just wear casual clothes. For example the band Architects, are just wearing normal t shirts and shirts. They do not have matching outfits and they do not fit into any particular theme.
Themes are more conventional with classic metal and rock bands as their music is normally written about stories, and their performances are them telling these stories. However hardcore music is about real life, hence the 'normal' look.

For our video we will all be wearing normal clothes, such as band t shirts and jeans to represent this normal hardcore look. Example below: