Here is a high-level overview of how to use a vector database. The examples in the video specifically uses Node.js + Chroma + OpenAI.
https://buymeacoffee.com/cmd_labs
Here is a reference to the code: https://github.com/Kalygo-io/api_kaly...
The application shown at 00:02:39 is called Kalygo and you can try it out at https://kalygo.io