The helicopter was flying at very low level practicing taxiing. It hit a scrub tree with the tail rotor and immediately hit on the rear skid, so probably 5-10 feet (2-3 meters). So it probably wasn't especially visible .
it would be quite difficult for a drone to approach horizontally. A hovering or slowly moving helicopter would easily blow it away no matter which direction the drone approached from. It would, however, be possible for a quickly moving helicopter to fly into a hovering drone.
Which really suggests that the helicopter caused the encounter with a legally operated drone and subsequently crashed due to a bad pilot reaction.
My guess, however, is really 'crashed due to pink unicorn' and a subsequent "lets blame a 'drone'".