This is very likely the 'Sham Fight' held every year on the 13th July and organised by the Royal Black Institution (also known as the Black Preceptory). The Black Preceptory is a Protestant fraternal society related to the Orange Order. The footage depicts quite a humourous battle reconstruction. This 'sham' sword fight shares features with other folk re-enactments such as the Morris Dance - a choreographed English folk dance.