You got a slight error in your code
PHP Code:
<embed src="betterflv.swf" quality=high pluginspage="http://www.macromedia.com/shockwave/download/index.cgi?P1_Prod_Version=ShockwaveFlash" type="application/x-shockwave-flash" width="320" height="240">
Should be:
PHP Code:
<embed src="betterflv.swf?file=/trailer1.flv" quality=high pluginspage="http://www.macromedia.com/shockwave/download/index.cgi?P1_Prod_Version=ShockwaveFlash" type="application/x-shockwave-flash" width="320" height="240">