yes, natural hamstring curls, which will probably be done as forced negatives even with bodyweight.
Also, for RDLs, did you deadlift the weight conventionally and then RDL it on the way down?
Addendum: It is called the Russian leg curl here: https://www.t-nation.com/training/fantastic-hamstring-movements, excersice#6 on the list. There are so many names for similar variations that I get lost, but I denote it as natural hamstring curl. Some call it manual. I am talking about the variation where there is minimal or no movement at the hip.
I do them by putting a bench in the power rack and hooking my feet under the rack catcher in a low hole, usually one of the bottom 2-3. I kneel on the bench. This also lets me get fully to parallel instead of running into the ground, so I can get 2-3 inches deeper than in the video.