There are lots of reasons why sometimes you are not able to watch your favorite YouTube video just the time you want it, e.g. bad Internet stream or video can be lost or deleted. In this case is the best to have this video already downloaded on your computer. Airy is a nifty app which allows you to download and keep all your best videos at hand. It is extremely helpful tool for downloading YouTube videos on your Windows computer. It saves the videos in different resolutions and file type, which gives you more freedom in actions. You can easily download full HD and 4K Ultra HD resolution videos to your hard drive and enjoy a super quality any time you need it. Airy downloads MP4, WebM, FLV, and 3GP file types and also it can extract MP3 sounds from YouTube videos.