The video to the left demonstrates the first step in testing: making sure that the claw is capable of gripping the payload.
The video to the right is the second step in the testing process, which was to ensure that the gimbal assembly is capable of stabilizing the drone in flight.
This video shows the drones capability to detect the payload so that it can autonomously retrieve the payload.
Lastly, this video shows the most up-to-date progress in the drone's ability to retrieve the payload. The team is still working on making changes to optimize the design for success.