Imagen previa en videos .flv

No se como puedo poner una imagen previa en el video flv que inserte en dreamweaver en una pagina html para que no me quede en negro el player como veras en: http://www.rednacadol.org.ar/videos.html
En sintesis quiero poner una imagen previa de alguna parte del video. El codigo es:
<td height="291" valign="top" bgcolor="#FFFFFF"> 
<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="342" height="291" id="FLVPlayer1">
<param name="movie" value="FLVPlayer_Progressive.swf" />
<param name="salign" value="lt" />
<param name="quality" value="high" />
<param name="scale" value="noscale" />
<param name="FlashVars" value="&MM_ComponentVersion=1&skinName=Halo_Skin_3&streamName=videos/JeSer1&autoPlay=false&autoRewind=false" /> 
              <embed src="FLVPlayer_Progressive.swf" flashvars="&MM_ComponentVersion=1&skinName=Halo_Skin_3&streamName=videos/JeSer1&autoPlay=false&autoRewind=false" quality="high" scale="noscale" width="342" height="291" name="FLVPlayer1" salign="LT" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" />             
</object>
</td>
<td height="291" valign="top" bgcolor="#FFFFFF"> 
<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="342" height="291" id="FLVPlayer1">
<param name="movie" value="FLVPlayer_Progressive.swf" />
<param name="salign" value="lt" />
<param name="quality" value="high" />
<param name="scale" value="noscale" />
<param name="FlashVars" value="&MM_ComponentVersion=1&skinName=Halo_Skin_3&streamName=videos/JeSer1&autoPlay=false&autoRewind=false" />              <embed src="FLVPlayer_Progressive.swf" flashvars="&MM_ComponentVersion=1&skinName=Halo_Skin_3&streamName=videos/JeSer1&autoPlay=false&autoRewind=false" quality="high" scale="noscale" width="342" height="291" name="FLVPlayer1" salign="LT" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" />             
</object>
</td>