Airy

Airy is a straight-forward and intuitive program functioning as a YouTube downloader, in the attempt to offer you access to all your favorite videos, so you can watch them on your computer regardless of your current Internet access.
Following an installation process with no noteworthy events, the tool creates a shortcut on your desktop, allowing you to access and launch it in just a few moves.
The application features a fairly simple and clean interface, with a small and non-adjustable window, that can also be minimized to the taskbar, being quite approachable even for less experienced users. It is intuitive and easy to work with, requiring simply that you input the URL address of the targeted video in the assigned field.
Airy allows you to choose the preferred output format and quality, featuring a variety of options, namely MP4 in 360p, 240p or 192p, as well as FLV, 3GP or even MP3, meaning you can even extract only the audio from the source video, thus letting you listen to it on any music playing device.
Afterward, you can click on the 'Download' button and the utility will prompt you to choose an output location, saving the video to the indicated path. By clicking on the thumbnail in the interface of Airy, you can open the containing folder, enabling you to render it in your default media player.
The tool can prove quite useful, particularly when you know your Internet access is time-restricted or when you do not feel like using YouTube to listen to your favorite music. Airy helps you save all the songs or videos you like on your system, so you can play them whenever you want.
In conclusion, Airy is a useful and reliable piece of software that provides with the means of downloading videos or extracting the audio from selected clips on YouTube.