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.
To further explain what exactly is showcased here, it's basically a web module for queuing audio playback on a timestamp, combined with a graph for automatic queue. Think dynamic in-game music that picks sections to play according to the current game state (Metal Gear Rising boss fights come to mind). The module can also be used for looping seamlessly as well. The Web Audio API integration (as opposed to simply using what HTML <audio> tag offers) allows for precise audio time, down to its samples. Also, the repository is a Node ESM package written in Typescript.