Embed video on a page

Thanks for that, Rod.

I had a bit more of a play around and think I have things as I want with the code below. Was able to wrap the iframe in a DIV and load a background image first (same image as the first image of the slideshow). Makes things look like it is loading faster.

My code now is:

<style>
@media only screen and (max-width: 650px){
    .iframeframe_sm { 
                    background-image: url("https://www.tasmanianphotos.com/website_slideshows/homepage_slideshow_1_sm_320_240/20200525- 091513-Ship-Stern-Bluff.jpg"); 
                    background-size: 320px 240px;
                    width: 320px; 
                    height: 240px; 
                    margin: 0; 
                    padding: 0; 
                    display: inline-block; 
                    }   
    .sm {
        display:block;
     }
    .lg {
        display: none;
    }
}

@media only screen and (min-width: 651px){
    .iframeframe_lg { 
                    background-image: url("https://www.tasmanianphotos.com/website_slideshows/homepage_slideshow_1_lg_600_450/20200525-091513-Ship-Stern-Bluff.jpg"); 
                    background-size: 600px 450px;
                    width: 600px; 
                    height: 450px; 
                    margin: 5; 
                    padding: 0;
                    float:left;
                    margin-right: 20px;
                    display: inline-block; 
                    }
    .sm {
        display:none;
    }
    .lg {
        display:block;
    }
}
</style>

<div class="iframeframe_lg">
<iframe class="lg" src="https://www.tasmanianphotos.com/website_slideshows/homepage_slideshow_1_lg_600_450/" style="width: 600px; height: 450px; border: 0;"></iframe>
</div>

<div class="iframeframe_sm">
<iframe class="sm" src="https://www.tasmanianphotos.com/website_slideshows/homepage_slideshow_1_sm_320_240/" style="width: 320px; height: 240px; border: 0"></iframe>
</div>

Let me know if you see any issues with the CSS above - but appears to be rendering all ok on the computer screen and phone now.

Cheers,
Chumby