Are you using the mobile with the Windows Phone operating system extended by Microsoft? If so, to download video or audio files into your Windows Phone, there is no need to use different applications as it is enough to use the single app ‘Media Downloader’ and conveniently download all media content online.
Media Downloader application supports downloading media content (music + video) from all popular websites like YouTube, Vimeo, Dailymotion and Metacafe. Besides audio downloading, you can also search for audio and listen music online with this app. To know more about Media Downloader app and download it go to Windows Phone Store