@TheVoidTLMB yeah, Yukki was amazing (I believe he passed away 11 years ago, sadly). He came from the yo-yo community too, as you can probably tell by his style, and was one of the first folks to really push loop diabolo into a more fleshed out style. Here's another video of him doing his loop routine https://youtu.be/3IiNtT49IJE?si=2jo3v7ftFq1FwmC8

And some cool footage of his yo-yo routine https://www.youtube.com/watch?v=tt2sxGCSHKE