Some old footage of people who witnessed the Ballymuprhy Massacre first-hand back in August 1971, carried out by the British Armys Parachute Regiment just months before Bloody Sunday. Full vids available here;
'Ballymurphy Internment 1971'
youtube.com/watch?v=ur_KLdc3lG0
'Operation Demetrius - Northern Ireland Riots' youtube.com/watch?v=nzMWfhI06O0
9:59