Video works really well for certain niches like dating. You'll need to get a swf video to use. If you have a video in another format, you can use http://www.freemake.com/free_video_converter/ to convert it to swf.
Once you have the video in swf format, add it to the folder where your landing page is located and add this code where you want the video to show up
<object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=8,0,0,0" width="280" height="210" id="Flash1">
<param name="movie" value="video.swf">
<param name="quality" value="High">
<param name="scale" value="ExactFit">
<param name="wmode" value="Window">
<param name="play" value="true">
<param name="loop" value="false">
<param name="menu" value="false">
<param name="allowfullscreen" value="false">
<param name="allowscriptaccess" value="sameDomain">
<param name="sAlign" value="tl">
<embed src="video.swf" width="280" height="210" quality="High" wmode="Window" loop="false" play="true" menu="false" allowfullscreen="false" allowscriptaccess="sameDomain" scale="ExactFit" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer"> </embed>
</object>