Hi @thomasmars,
Thanks for reaching out!
This was built as a “Zoom App”, a new type of app that we recently introduced alongside some select beta partners (such as Kahoot). In order to develop something like this, you would need to use the Zoom Apps build flow—However, Zoom Apps have not yet been released for developers (only some beta partners), as we’re still working on getting ready to make development resources available.
You should expect to hear updates on this shortly, and we hope to release Zoom Apps for general availability for developers very soon.
Thanks,
Will