As a heads up, the issue applies not to the top of the page within the contact us section and “Play Demo” video, but to the smaller boxes further down the page, such as the videos contained within the paginated video portfolio section.
Yes, we are also using a plugin called “WP Video Lightbox” to power the demo reel at the top of the page ABOVE the paginated video portfolio items, but we never had a conflict before when on HTTP only.
Additionally, the demo video currently works fine and when right-clicking any video portfolio item, inspecting it, and modifying the following code to be HTTPS, the video portfolio items work as well.
<iframe class="cboxIframe" name="cbox1487443925281" src="http://www.youtube.com/embed/5fLWLrIuz_w">
So, it seems that the video [portfolio] shortcode is not passing an HTTPS video link. This makes sense because we added an HTTP link inside the Media box. That said, when we add an HTTPS link to the Media box, we get an error inside the white frame of the lightbox when it pops up. So, how do we get the video [portfolio] shortcode to output an HTTPS protocol within the iframe?
I’m not sure this is the “right” or best way to go about it but it seems to me to solve the problem. I just don’t know how to do it. I hope this helps.