Best Youtube Downloader - Version 1.0.2 We are happy to introduce free Best Youtube Downloader for Mac and Windows. It provides the easiest method to download YouTube videos in FLV, MP4, WebM with 720p HD and 1080p FullHD qualities right from YouTube video pages.It it implemented as browse extension and works in Internet Explorer, Firefox, Safari and Chrome.It is easy to install and use. After installing the extension visit youtube website and below the video you can find a Download button. Click on the button - a popup menu with video formats will appear. Select the format and download will start automatically!