Minitube is described as 'YouTube desktop application. With it you can watch YouTube videos in a new way: you type a keyword, Minitube gives you an endless video stream. Minitube is not about cloning the original YouTube web interface, it aims to create a new TV-like experience' and is a popular YouTube Client in the video & movies category. There are more than 50 alternatives to Minitube for a variety of platforms, including Windows, Linux, Android, Web-based and Mac apps. The best Minitube alternative is NewPipe, which is both free and Open Source. Other great apps like Minitube are YouTube, FreeTube, AIMP and LibreTube.
Just tried MotionBox and it seems to work well for youtube. I simply could not get Minitube to be usable at all. PS. I tried a number of the alternatives listed for Linux and MotionBox was the best.