Play video files (youTube etc) files in sharepoint

Place the following code in content Editor Webpart

 <object width="380" height="385">
                    <param name="movie" value="http://www.youtube.com/v/i5VDAx1xD3E123&hl=en_GB&fs=1&rel=0&color1=0x2b405b&color2=0x6b8ab6"></param>
                   <param name="allowFullScreen" value="true"></param>
                   <param name="allowscriptaccess" value="always"></param>
                   <embed src="http://www.youtube.com/v/i5VDAx1xD3E123&hl=en_GB&fs=1&rel=0&color1=0x2b405b&color2=0x6b8ab6" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="650" height="385"></embed>
               </object>