Context: Personally, I fully support regulated hunting for food, don't like hunting for trophy, and don't like the use of raised birds in a pigeon shoot (which seems to be the practice under scrutiny here).
After watching the video, I think there are two main issues - one (dealt with at length here) is about whether or not it was right and/or legal to shoot down the drone. The second one is whether or not it is right and/or legal for Hindi's group to be harassing the Broxton Bridge Plantation. His tone throughout and his words at the end of the video are clearly harassment - "we have a lot of plans for those people, that much I can guarantee."
If the shoot is legal, then the harassment should be illegal and the goal of Hindi's group should be to change the law through non violent protest and engaging the public (potentially with video).
If the shoot is illegal, then law enforcement should handle it. If they do not, the goal of Hindi's group should be to change the actions of law enforcement officials through non violent protest and engaging the public (potentially with video). The harassment should still be illegal.
I think this group has confused non violent protest against immoral laws with harassment of groups doing things you don't like.