The app allows you to have quick access to thousands of items sorted by several criteria.
The section with the heart is the list of homepages of friends channels that have been selected, if you have a channel and you want to be included write to email@example.com or use the dedicated button in the info section.
The application is very light and will be updated every month with new channels and fresh content. Internet connection is required.
To see the videos you should use the official YouTube app or you can choose to use any compatible browser or application.
Good watching and listening!