HD Downloader can download UHD 8K, 5K, 4K, QHD 2K, FHD 1080p, HD 720p, and 3D videos from YouTube if they are available. HD Downloader supports playlist download. It automatically downloads all videos in the specified playlist for you. HD Downloader can automatically convert videos to MP4, FLV, WMV, MOV, AVI, MKV, MPG, OGV, VOB, WEBM, or any other format for any device, so you can watch them on your iPhone, iPad, Android phone, Android tablet, Windows phone, Xbox, PS4, Samsung Galaxy, etc. HD Downloader allows you to download only audio stream from YouTube, without downloading the entire video file. It also allows you to extract audio stream from video and save it as MP3, WAV, WMA, AC3, AAC, OGG, FLAC, or any other format. Optionally, HD Downloader can automatically add downloaded videos/music to your iTunes library, so you can easily synchronize your videos/music to your iPhone, iPad, iPod. HD Downloader integrates with Internet Explorer and Firefox, so you can download any video with just one click. You can also directly drag and drop video link from your browser to the Drop Box of HD Downloader to start download. You don't even need to copy and paste video URL manually.