There is a video downloader with support for many services which is called Freemake Video Downloader. I have installed it and it works properly. In the image below, you see that I have successfully downloaded videos from YouTube, DailyMotion, and Vimeo. There are other services supported as well.
Download: http://www.freemake.com/free_video_downloader/
Note: The installer will offer you to install other applications as well. Choose Custom and uncheck the offers.
