From the video description
"Try it on your device: https://dev-fiddle.noisysundae.com
Anyway, the test tracks there aren't ones in this video, plus no Safari support due to its autoplay issue (hinders scheduled audio playback, which is used in this prototype).
Just in case anyone here is a dev and interested, lately, I'm creating my own Node Typescript monorepo using local dependencies approach (just skim at part of my code around the middle of this video), and it's working very well so far. I intend to use them as building blocks for various kind of apps including games and interactive visualizer. Might make some of them (templates and APIs) available on GitHub some day."
— The Manager
Long time no see. I'm not dead, just broke, tyfyt.
Syrupmasterz
Welcome back to Newgrounds! Looking forward to seeing what you make down the road. :)