Though there are many youtube downloading software but still some get expire or stop working. IDM is best but hard to get one. However savevideo.me allows you to download videos from youtube and 25 online video resources including top sites as myspace, vimeo, metacafe, collegehumor, Veoh etc. Select the video you want to download from youtube, copy its URL from its address box and paste it on this website and click download. You would get options of which quality you want to download, select download video file and it starts download.