Airy is a simple Youtube downloader that allows to download videos and audio from YouTube
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Pro Pause and resume downloads
Pro Download private, age restricted videos
In Airy menu you can log into your YouTube account (and save your login and password for future, if you'd like) and download age-restricted videos.
Pro Download videos in batch
With Airy it's possible to download multiple videos at once.
Pro Download playlists and channels from YouTube
To download YouTube playlist or channels you just need to paste the URL.
Pro Download music straight from the site
Besides video formats, you can download MP3 files.