Hi,
The problem with embedded videos lies in WordPress core’s implementation of the MediaElement.js script. It is added synchronously in the page’s footer and no event to reload it after AJAX requests (or at least we haven’t been able to discover them).
Even their own themes suffer from this implementation, take for example Twenty Thirteen‘s demo at wordpress.com. With infinite scroll the audio player doesn’t load.
The only compromise solution we have found is to scrap the MediaElement skin the theme uses and fall back to the native HTML5 player on AJAX events. That’s how we’ve implemented it in Enlightenment theme.
Before going forward with this change I would like to ask your opinion in this regard. How important is the audio and video player’s skin for your videos? Would you agree to use the default skin from WordPress and fall back to the native HTML5 player on events such as infinite scroll?