iv-org/invidious ? reverse-engineered prompt

Build me a privacy focused alternative front end for YouTube that feels fast and simple to use.

I want a site where people can search for videos, open a watch page, read descriptions and comments, subscribe to channels without using a Google account, and keep a personal feed and notifications for new uploads. It should be lightweight, work without ads or tracking, and still be usable even if JavaScript is off. Add light and dark themes, a customizable homepage, audio only playback with background play on mobile, and support for multiple languages. Please also include import and export for subscriptions and watch history from common YouTube alternative apps, plus a way to handle embedded videos and a simple developer API if that fits naturally.

Make it easy to run locally or self host, and if you need to look up current docs online while building it, go ahead.