CYBERDEVILZ/YoutubeBot ? reverse-engineered prompt

Build me a simple Python tool that can automate watching a YouTube video for me using Selenium.

I want it to be easy to run, with support for Chrome or Firefox, and it should let me enter a YouTube video URL, how long to watch it for in HH:MM:SS, and how many times to repeat it, including an infinite option if I want it to keep going. If the browser drivers need to be set up, please make that clear and keep the setup as simple as possible.

Please make the script straightforward to use, with clear prompts or a small interface, and include the basic install steps so I can get it running quickly. If anything about the current browser or Selenium setup might need a quick check against the latest docs, feel free to look that up online.