How to secure flash player src in asp.net

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C#

ASP.NET

Flash

video

I am working on a portal that will allow the authorized users to watch different TV channels. The TV channels details along with its basic info and video link also saved in the database. In the TVChannels form, I am using GridView to display the channels. When user click on a channel, I am getting ChannelLink string variable (which is video link) on ClickEvent from Database and then add flash player controls to a panel along with link in below code:

Panel1.Controls.Add(new LiteralControl("<object width=\"100%\" height=\"100%\">"));
Panel1.Controls.Add(new LiteralControl("<param name=\"movie\" value=\"http://fpdownload.adobe.com/strobe/FlashMediaPlayback.swf\"></param>"));
Panel1.Controls.Add(new LiteralControl("<param name=\"flashvars\" value=\"src=" + ChannelLink+ "&controlBarMode=floating&autoPlay=true&streamType=live&scaleMode=stretch\"></param>"));
Panel1.Controls.Add(new LiteralControl("<param name=\"allowFullScreen\" value=\"true\"></param>"));
Panel1.Controls.Add(new LiteralControl("<param name=\"allowscriptaccess\" value=\"always\"></param>"));
Panel1.Controls.Add(new LiteralControl("<embed src=\"http://fpdownload.adobe.com/strobe/FlashMediaPlayback.swf\" type=\"application/x-shockwave-flash\" allowscriptaccess=\"always\" allowfullscreen=\"true\" width=\"100%\" height=\"100%\" flashvars=\"src=" +ChannelLink + "&controlBarMode=floating&autoPlay=true&streamType=live&scaleMode=stretch\"></embed></object>"));

The Video embed and played successfully in this way. BUT the problem is my Video Links are exposed to any one and that can be reused easily by viewing the html source of Flash player. So please help me how to secure my video links?