FreeTube app is easy to install on Ubuntu computer. Download the program file (AppImage) and run it right away. You do not need complicated ways and commands at all. Here is the step by step tutorial with pictures for everyone who wants to run it. Enjoy!

(All apps are now simple to run thanks to AppImage technology)

Enjoying YouTube without YouTube means you can watch and download all videos from it everywhere by alternative ways so that you don't run nonfree software or surrender your privacy. There are good news I want to share with you as there are already Invidious and CloudTube for computer users while NewPipe for phone users. They are all free libre open source software developed by community you can trust. I am happy with these solution so I want you to share my happiness as well. Enjoy!