Edit pinned comment across 1000s of YT videos on your channel without 3rd party?

I am sure we have all ran into this problem. Let's say you have a YouTube channel where you post regularly. It has 100s or even 1000s of videos. How do you manage changing the pinned comment across all these videos every once in a while without using 3rd party products like TubeBuddy. Is there a bash script or a programmatic API that you are aware of which can handle this? What are you guys doing on your end?