This video is most likely from 2013-2016. I dont rememeber the lyrics but they are acting out a battle with fake weapons and colourful silly cardboard outfits.
Its a group, mayne mixed gender. mid tempo song. The song is vaguely about battle but also may be a metaphor for love. Its folksy type rock along the lines of the lumineers or mumford and sons. The whole band sings in the chorus.