If you have ad-block plus, there is a little tab on flash (.swf) objects where you can right-click on it and save the object.
I think (operative word being think) that the original poster is looking for the code behind the scenes. Sites like the one mentioned are little more that a WYSIWYG (What You See Is What You Get) online web building tool. They automatically create the code that makes things happen.
Therefore if you have and embed a flash file (or any multimedia file) the WYSIWYG ediror creates the code that runs the file on a browser. The Flash File itself can be user created or copied from a web somewhere. The file itself is placed in the root of the web or in a folder placed in the root of the web. For example I create a folder in the root of my web. I name the folder Flash and maybe another folder called Videos and so on.
Then on a webpage within my web I use code like this:
<OBJECT classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,0,0" WIDTH="320" HEIGHT="240" id="Yourfilename" ALIGN="">
<PARAM NAME=movie VALUE="Yourfilename.swf"> <PARAM NAME=quality VALUE=high> <PARAM NAME=bgcolor VALUE=#333399> <EMBED src="Yourfilename.swf" quality=high bgcolor=#333399 WIDTH="320" HEIGHT="240" NAME="Yourfilename" ALIGN="" TYPE="application/x-shockwave-flash" PLUGINSPAGE="http://www.macromedia.com/go/getflashplayer"></EMBED> </OBJECT>
The above code is explained
in some detail. I suggest the original poster read it. Not a bad link. Not great but not bad.