Lighttube - A lightweight, privacy respecting alternative frontend for YouTube written in ASP.NET
GitHub - kuylar/lighttube: An alternative YouTube front end written in ASP.NET
https://github.com/kuylar/lighttube
An alternative YouTube front end written in ASP.NET - GitHub - kuylar/lighttube: An alternative YouTube front end written in ASP.NET
They have an IzzyOnDroid app in early development.
edit: Here are the instances that are up at the moment: