That's what I did for ~6 years before I started using Piped with LibRedirect in my browser and LibreTube on my phone. It's honestly the best YouTube experience I ever had. FreeTube is great if you prefer a desktop app, as well as Yattee with this guide on iOS or SmartTubeNext on Android TV.
If you want to download YouTube videos, don't use a website for this. Check out yt-dlp, you can either use the command-line tool or a GUI like yt-dlp-gui or ClipGrab if you want a noob-friendly version. If you need to download Videos on your phone, try Seal.
Also, most of the solutions I mentioned in my previous comment also support video downloading, but it's not always reliable.