You will get to know the number of unread items of your favorite site in a small window on the bottom of the application. You can easily view your feed, subscribe, unsubscribe, mark as read and so on. With the built-in browser you will be able to find videos of your interest, open it and enjoy. The extension will keep checking the unread status of your favorite site, in order to present you with the most accurate number of unread items.

You can open any site that has a video feed and an RSS reader extension. Of course you will need a good internet connection, to work. 

How to use it:

Open your favorite site and create a reader. If you want to get an overview of unread items in a particular domain, choose a site.