I'm building an application that integrates with the YouTube Data API v3, and I'm considering using the channel ID (e.g., `UCxxxxxxxxxxxx`) as a primary key in my database.
Before doing so, I'd like to confirm:
1. Can two or more channels ever have the same channel ID on YouTube?
2. Is the channel ID permanent and immutable, or can it change over time?
3. Can a channel ID ever be reused after a channel is deleted?
I want to ensure data integrity in my database design. Any official documentation or references would be appreciated.