We want to make both image and video configurable(play video button on image)

we have play video button on one image(it is a single image. Not two different images). We want to make both image and video configurable. How can we do that? Please suggest.

<div class="mktoVideo" id="WITVideo" mktoName="WITVideo">                 

     <video class="responsive-video"  poster="na-ab20.marketo.com/rs/468-GTJ-454/images/aquaWIT-video-cover.jpg" controls> 

           <source src="${BodyVideoURL}">

       </video>                  

</div>

We need to make both image and video given in above code configurable(editable).