Improvements to YT description auto-updater

[shiffman]

Now that #1621 has been merged, here's a thread to discuss enhancements and any other next steps!

#1621 (comment)

I was finally able to get this to work! I updated a toxiclibs video (https://youtu.be/E67e0RX-7Ew) that had a "typo" noted in #1770. I'm going to merge PR now. It would be no small task, but what I would love is something along the lines of what @fturmel suggestions with even a local server spinning up a simple UI to see the list of videos, look at what changes, and select videos to be updated. This is not something i have a lot of time to work on now, but maybe we open an issue and tackle in the future?