mayurkadampro/YouTube-SubBot ? reverse-engineered prompt

Build me a simple Python app that automates subscribing to YouTube channels from a list.

I want it to be easy to run, with a clear start screen or script entry point, where I can paste in the channel links or names and then let it handle the rest. It should open YouTube, go to each channel, click subscribe if I am not already subscribed, and keep going through the list without me having to do each one manually. Please add basic status messages so I can see what it is doing, and make it pause a little between actions so it feels natural and does not rush through everything.

If you need to, look up any current browser automation details online before wiring it up. Keep the code simple and well organized, and include a short note on how to run it and what I need installed.