At this point, the man's left hand, which arguably may have been reaching for a weapon in the immediately preceding slide, is clearly visible and weapon free.
Guy runs
In the video, the guy runs because the cop starts chasing him with his gun drawn even though the threat appears to have dissipated. As the cop starts to give chase with his weapon drawn (perhaps looking for a clean shot to the unarmed guy's back), two other cops show up and exercise resistant over the cop who had drawn his weapon.
And the man’s right hand?
Why were the other LEOs running after the man then?
We weren’t there. It’s not clear cut.