Airy is a YouTube video downloader, i.e. it is an application that allows you to save your favorite YouTube videos so you can watch them whenever you feel like - no matter whether you are connected to the Internet or not and whether it is still available on the web site. ###>Airy is a YouTube video downloader, i.e. it is an application that allows you to save your favorite YouTube videos so you can watch them whenever you feel like - no matter whether you are connected to the Internet or not and whether it is still available on the web site.