That catch is actually the same as the old MARS (Mid Air Retrieval System) first used by the USAF and Navy to catch drones, and later by a USAF unit to catch payloads (spy film?) from Satellites
back in the early 1970's!
The MARS was perfected by a pair of Sikorsky test pilots who have since retired, it was done on H-3 and H-53 helicopters. It fell from popularity when the downlinks and data rates allowed electronic picture transmittal.
http://www.wpafb.af.mil/museum/history/rescue/res13.htm
http://www.wpafb.af.mil/museum/history/rescue/res13.htm
http://www.usafhpa.org/h53mars.htm
The procedure that was used back then was to set a fixed speed, usually about 120 knots, and then line up on the chute with a rate of descent to match the object. Then just maintain the closure with the chute, keeping a constant aspect to it, just like a normal approach, and fly right into it, passing just over it so the trapeze snags the chute.
The biggest challenge related to me was to get the lineup from the radar controllers so the maneuver needed was within the realm of reality for the helo. For satellite payloads, the chute was small and almost invisible, so it was said to be expecially difficult. A USAF Special Operations squadron in Hawii was said to have the job of catching satellite films back in the mid 1970's. It was light duty for the group of combat veterans who thought Hawii was a bit better duty than night missions on the Ho Chi Min trail.
I believe one accident occurred in a MARS Navy H-3, where the chute became entangled in the tail rotor (!) I dimmly recall an Approach magazine article where the co-pilot made it out with a parachute, having been pinned against the sponson for several harrowing rotations of the falling wreckage, his visor completely blurred by the spraying oil from the wreckage.