Most of the Joomla users find it difficult flash(SWF) files into the custom Joomla module or a Joomla article. Joomla default editor doesn’t have the option to insert flash files. So to embed flash files into your Joomla website, you must have to upload to a directory/folder using media manager or FTP. After uploading it, you can now follow any of the three steps mentioned below. Here is How to add a flash file into a custom Joomla module.
<object id="applicationID" style="margin: 0 10px; width: auto; height: auto;" width="320" height="240" classid="clsid:d27cdb6e-ae6d-11cf-96b8-444553540000" codebase="https://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,40,0"><param name="wmode" value="transparent" /><param name="FlashVars" value="" /><param name="quality" value="high" /><param name="menu" value="false" /><param name="src" value="/dir/application.swf" /><param name="flashvars" value="" /><embed id="applicationID" style="margin: 0 10px; width: auto; height: auto;" width="320" height="240" type="application/x-shockwave-flash" src="/dir/application.swf" wmode="transparent" flashvars="" quality="high" menu="false" flashvars="" /> <!-- Or opaque, etc. --> <!-- ↓ Required paramter or not, depends on application --></object>
You can even install JCE Editor which helps to embed the SWF directly into a custom module or Joomla article.