Aiseesoft YouTube Downloader Pro is the professional YouTube video downloader to download online videos from YouTube Google Video Yahoo Video iFilm MySpace Dailymotion and many others. The supported video sites can be up to 150. The supported protocols includes http rtsp rtmp mms and more threads for downloading task. This YouTube Downloader Pro could also convert the local and downloaded video files to any other video and audio formats automatically.Key Functions1. Online video downloader Using this YouTube Downloader tool you can download almost all the online videos from almost 150 video sites like YouTube video Google video iFilm MySpace Dailymotion etc.2. Convert the downloaded video or the local file The download video files can be directly converted to any other videoaudio formats. You can also directly add local video files to the video converter to convert videos.3. Support multi-downloading tasks and multi-threads This FLV downloader can set maximum downloading tasks and maximum threads for every task.4. Set the specific output parameters For you to get the exact file from the video site this YouTube Downloader provides you with more adjustable specific parameters including Video Resolution Video Bitrate Frame Rate Encoder and Audio Channels Sample Rate Encoder Audio Bitrate.5. Support more video site and protocol The supported video sites can be up to 150 and it supports more protocols including http rtsp rtmp mms.6. Preview the downloaded and converted video file After you successfully download the online video you can preview the downloaded file on the preview window.7. Show you the downloadingconverting speed and progress exactly At the bottom of the interface the exact statistics of downloadingconverting speed and the progress will be showed.8. Easy to use Aiseesoft YouTube Downloader has a built-in monitor which can detect the video being played automatically.