cfpresentation

I have the ppt and i want it to use the cfpresentation but dont know how to do it.  i've been looking some example from web and don't understand about it because some used .flv, some used swf, jpg, ect.  i have no idea what those for.  I found this example to converts a PowerPoint presentation to an Adobe Connect presentation but don't really understand the code where there have the video1.flv? why it needs .flv or swf or jpg for?

<cfpresentation
    title="my presentation"
    directory="#expandPath('.')#"
    overwrite=true>
    <cfpresentationslide
        src="#expandPath('.')#/test.ppt"
        slides="1">
    </cfpresentationslide>
    <cfpresentationslide
        duration="4"
        video="video1.flv">
            Sample slide
    </cfpresentationslide>
</cfpresentation>

please help

thanks