How does youtube want you to request a transcript? POST/GET... Does it need a JSON object?

[War3Evo]

I am researching how to do this for Delphi 11.0, but I don't understand C# very well. I plan to build a opensource component similar to this but for Delphi.

I need this information:

When I say command... I mean POST / GET command. Delphi has its own JSON component that can handle it. Did you need to "always be in https" or could you just use http?

The command needed to request the transcript from YouTube.

The command needed to get a list of videos from YouTube.

Looking through the C# programming source code seems like some other component is doing all the heavy lifting (I suspect AngleSharp?). I still would like to understand what YouTube needs in order for me to send requests out and get responses. I'm sure the developer has looked hard into how YouTube formats everything and is the TOP expert of understanding the inter-workings of YouTube's HTML/CSS/Javascript, etc.