Streamlink forum is good place to learn about streamlink and streams.
If this forum didn't exist that would be my forum of first choice.
Github website is not so friendly, and it is easy to miss tons of good information.
This link opens issues tab:
https://github.com/streamlink/streamlink/issues
Open issues titles are shown by default, "73 Open".
https://github.com/streamlink/stream...pen+is%3Aissue
clicking on "294 Closed" shows closed issues, this does not even look like a link.
https://github.com/streamlink/stream...ue+is%3Aclosed
Here is one example of information found on forum that is not found in documentation:
Need help with a stream and command line #705
https://github.com/streamlink/streamlink/issues/705
To be continued...