Here's how you can install Minitube 2.1.6 in Ubuntu 13.10. Minitube makes it easy to watch YouTube videos on your Ubuntu system.
1. Open a terminal window.
2. Type in the following commands then hit Enter after each.
sudo add-apt-repository ppa:nilarimogard/webupd8
sudo apt-get update
sudo apt-get install minitube
Minitube is a lightweight Youtube client, that enables the users to easily watch Youtube videos, by creating an endless video stream related to the searched keyword. Since it does not use the flash player, it consumes less CPU and preservs the battery of your laptop.More at Linux G
Additional resources for Minitube