My suggestion is that it is better to use (A TUBE CATCHER) a you tube downloading software , that is much better than all other usual you tube downloaders ... And this doftware also includes MP3 downloading, ONSCREEN recording and much more .....FreeRapid Downloader is awesome. From the website:

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Main Features

• support for CONCURRENT downloading from multiple services
• downloading using proxy list
• support for streamed videos
• download history
• smart clipboard monitoring
• automatic checking for file's existence on server
• auto shutdown options
• automatic plugins updates
• simple CAPTCHA recognition
• works on MS Windows (all, include Win7), Linux and MacOS
• easy to use
• multilanguage INTERFACE Bulgarian, English, Czech, Finnish, Hebrew LANGUAGE, Slovak, Korean, Polish, Portugal (Brasil), Ukrainian (other languages will come soon). Information for translators is here.
• looks great
• more than 230 supported sites!
• simply works! more over 2 000 000 users can confirm that

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Well-known international sites!

• Rapidshare.com (+ premium)
• MegaUpload.com & MegaVideo.com
• NetLoad.in
• MediaFire.com
• Hotfile.com
• FileFactory.com
• Filebase.to
• Uploaded.to
• DepositFiles.com
• Share-online.biz
• Storage.to
• Uploading.com
• Egoshare.com
• Easy-share.com
• Letibit.net
• File2Box.com
• Shareator.com
• Kewlshare.com
• SaveFile.com
• 4shared.com
• Load.to
• UploadBox.com
• UGotFile.com
• FileUpload.net
• Uppit.com
• FileFlyer.com
• EasyShare.ws
• Freakshare.net
• UploadLine.com
• Picasa.google.com
• YouTube.com (video)