I am pretty sure the Cessna was landing. He had flaps down and you don't usually use them for takeoff in that airplane. NOTAMS cover a period of time and do not say specifically there will be a skydiver landing on the runway at 13:16Z on 21 Aug 2020. They should make an announcement over the radio just before and when they drop the bumbershoot enthusiasts]
The NOTAMS will say, for example " Alert area 409Papa - Skydiving operations underway dawn to dusk on such and such days, surface to 12,000 ft. Monitor such and such frequency and all traffic to remain East (or West) of such and such runway" or words to that effect. The pilot was doing touch and goes, knowing the skydivers were in the air, and the skydiver undershot his landing area. Both shared the blame.