I've been using Nebular for a while now. It's not as feature-rich as YouTube, but I quite like it, and it feels good to support a smaller less evil corporation than Google.

Recently I installed a couple of browser extensions to improve my Nebula experience. Watch on Nebula gives you a popup if the YouTube video you're about to watch is also available on Nebula, while Enhancer for Nebula gives you a few quality of life improvements.