I watched it yesterday, and as I remember, the video showed a guy pulling the shark up out of the side by holding onto its sides, then moving towards the camera with it. The sharks, in general, were not struggling, nor, after release, did they swim quickly away - more like drifted back towards the sand or swam off in the opposite direction. The divers did not appear to be riding the shark, nor did the shark appear very distressed (they can really move out if they want to get somewhere).
Is it the best thing to show new divers or encourage? Probably not. However, I will state this again. Divers make an impact regardless of how hands-off your dive is. Be it the boat you ride on, the scary bubble noises you make, the kelp/coral disturbance, the car you drive to get to the dive site. In general, these have much larger impact (especially the boat ride), than feeding a few garibaldi or waking a nurse shark from its daytime nap. So, if you have this opinion of doing zero impact - stay home.