Editors' Note: CBS Interactive does not encourage or condone the illegal duplication or distribution of copyrighted content.
Apart from just downloading YouTube videos, Airy allows you to choose a required format and resolution; formats supported include MP4, FLV and 3GP. It also lets you extract and save only soundtracks - all you have to do is to choose MP3 from the list of the formats displayed when downloading. The app will fetch album art & titles from the files. You can resume paused or interrupted downloads and set up event notifications for your convenience.
What's new in this version:
Added: an Italian localization. Improved: parsing and downloading of large playlists. Fixed: downloading of subtitles. Fixed: minor incompatibilities with macOS 10.12 Sierra. Fixed: a few cosmetic issues in the interface.