Video ends before conclusion. A gun fight can become a ground fight and vice versa.
The guard can be seen holding another rifle which has no magazine. He renders the weapon safe after retrieving it. He later returned the guns to police.
Seeing police in retreat, the crowd mistakes this for a lack of will to fight. Once a police officer falls and has their gun taken, his colleagues return and now have a justification for use of deadly force.
On foot, walking down an open road with no cover, no concealment, in a tight group, surrounded by terrain which could easily conceal enemy from any direction. This is how you march on parade, not move through an active warzone.
Holding a gun to someone at close range means things can get very complicated very quickly. Within arm’s reach usually isn’t a good range.