Invidious

Invidious is an open-source alternative front end to YouTube. It provides video playback, subscriptions independent from Google, channel notifications, audio-only playback, customizable themes and homepages, multilingual support, data import and export, embedded videos, and a developer API. It does not use the official YouTube APIs and can be used without JavaScript; users can access it through public instances or host it themselves. The project is distributed under the GNU Affero General Public License v3.