I think I see what Mark is talking about with the speed control - I just happened upon his “Fully Freestyle” video from October 2019, and somewhere in the middle I started noticing that it appears as though he was making slight adjustments in the video speed as part of post production. Near the beginning, I think it was the second song, it started to look like the video was slightly sped up, but I remember thinking the same thing when I was watching Jet Li. But I know it’s possible for people to move so fast it looks ever so slightly unnatural. And then at some point around the middle of the video, I noticed a few places where Mark got the yoyo to slow down in the middle of the air only just slightly. That’s it, right?
Markmont. FullyFreestyle (oct ‘19) and if you want to see a short clip example of what I mean, 5:30-5:45.