maybe you html code with flv is error. you can insert right code like this:
<object classid=”clsid:d27cdb6e-ae6d-11cf-96b8-444553540000″
Code:
<object classid=”clsid:d27cdb6e-ae6d-11cf-96b8-444553540000″ codebase=”http://download.macromedia.com/pub/shockwave/
cabs/flash/swflash.cab#version=7,0,0,0″ width=”400″ height=”300″
id=”flashvideoplayer.swf” align=”middle”>
<param name=”allowScriptAccess” value=”sameDomain”>
<param name=”movie”
value=”http://www.myhomepage.com/flashvideoplayer.swf?
flv=http://www.myhomepage.com/myvideofile.flv“>
<param name=”quality” value=”high”>
<param name=”bgcolor” value=”#ffffff”>
<embed src=”http://www.myhomepage.com/flashvideoplayer.swf?
flv=http://www.myhomepage.com/myvideofile.flv” quality=”high” bgcolor=”#ffffff” width=”400″ height=”300″ name=”flashvideoplayer.swf”
align=”middle” allowScriptAccess=”sameDomain” type=”application/x-shockwave-flash” pluginspage=”http://www.macromedia.com/go/getflashplayer”>
</object>
More info, you can view:http://www.flash-video-soft.com/blog/?p=4