If you want to convert your file into any format, Zamzar is a web-based file conversion tool that can convert your video, audio, images, and documents from nearly any format. No sign up and no download is required for converting files.
For converting a file, select file from your computer, Zamzar ask you which format to convert. You supply your e-mail address and click “convert” and Zamzar will e-mail you a link to the converted file. You can convert youtube video directly from site you just give video URL in the place of “select fileâ€
Zamzar convert files up to 100MB for free if you want more convert, they provide basic, pro and business services.