YouTube Video Downloader allows you to download only audio stream from YouTube, without downloading the entire video file. YouTube Video Downloader can automatically convert downloaded video to the format that you specify. It supports MP4, FLV, WMV, MOV, ASF, AVI, M4V, MKV, MPG, OGV, TS, VOB, WEBM, and many other formats. YouTube Video Downloader automatically converts and optimizes downloaded video for your mobile/desktop device, so you can watch it smoothly on your iPhone, iPad, Android phone, Android tablet, Xbox, PSP, PS4, Samsung Galaxy, or other device. YouTube Video Downloader allows you to extract audio stream from video, and save it as MP3, WAV, WMA, AC3, AAC, OGG, M4A, FLAC, or any other format. Optionally, YouTube Video Downloader automatically adds downloaded video/music to your iTunes library, so you can easily synchronize your videos and music to your iPhone, iPad, etc. YouTube Video Downloader integrates with Internet Explorer and Firefox, so you can download and convert any video with just one click. You may also directly drag and drop video link from your browser to the app window to start download, you don't even need to copy and paste video URL manually.