Some questions about instance hosting

[shengchenyang]

problem description

I have some questions, These are not bugs:

1. API_EXTERNAL_PROXY
   when I configure API_EXTERNAL_PROXY, the service that cobalt returns the youtube video download link uses this proxy. So when I download it, will cobalt still use this proxy?

2. How to parse youtube stably, API_EXTERNAL_PROXY or cookies?
   Is it more stable to use API_EXTERNAL_PROXY dynamic proxy?
   The documentation still has an example of youtube_oauth, but it doesn't work. Could you include an example of cookies?
   If using cookie，what is the validity period of cookies, how to add multiple cookies? Can I update cookies less frequently like yt-dlp?

your instance configuration

[shengchenyang]

I have already found the answer in Discord and historical issues.