What is the right plugin patches environment to alter studio.yml?

Thanks! That was my guess, but I was doing the steps here, which said to edit the studio.yml

https://edx.readthedocs.io/projects/edx-installing-configuring-and-running/en/latest/configuration/youtube_api.html

and I made a plugin like this:

name: YTAPI_Plugin
version: 0.1.0
patches:
lms-env: |
“YOUTUBE_API_KEY”: “Redacted

cms-env: |
  "YOUTUBE_API_KEY": "*Redacted*"

But I still couldn’t import video transcripts from YouTube, so I didn’t know if it was working or not.

Is there a place I can find the studio.yml to see that it got inserted properly?