If you are finding your embedded videos are not showing on your web pages, or they have disappeared, this is most likely due to an external plugin affecting your site and the embedded video elements
Most commonly we find that
"Lazy Load / Lazy Loading" plugins can affect this functionality. Specifically Lazy Loading options for iframes or video can affect videos on your pages.
Please check your site by disabling other plugins and see if this fixes the issue
We've listed details of plugins we've found solutions for below:
Smush by WPMU Dev
This plugin has a Lazy Load feature built in which can affect our video element. Please turn off
iframe inside the Lazy Load settings for the Smush plugin - this should fix the issue on your OptimizePress3/OptimizeBuilder pages.