If there's video available from the first minutes (and there should be, as it looked like there were several LEO's already on the scene and the helicopter had been there a while), the Tulsa PD should release it. They haven't.
I get the impression there isn't video until the helicopter and second cop car arrived. I don't know if all cop cars are equipped with them in Tulsa.
Considering they did release the very damning video (and audio) from the helicopter and second cop car, it seems if they had earlier video - that would surely be less damning since he wasn't tased and shot in it - they would release that also.