I am running the demo bundled with the SDK on a new DevKit (black). Built with latest Unity 2019 on a Mac.
The good:
Clicking UI elements with the pointer ray and a pinch is working reasonably well.
The not so good:
Hand pose detection is terribly flimsy. Some filtering could possibly make it more usable but I would expect that filtering to be done by the SDK rather than everyone for themselves.
When doing a small experiment to attach an object to the index finger tip, it became very apparent that the z-pos (relative to camera) of the joints are completely off.
It is quite obvious from your video that you don’t have the same problem with joint “flickering” as I experienced. Are you using a devkit compute puck or a phone? What Unity version?