Embed Video and WP
With the recent upgrade of WordPress to 2.5.1, and in fact, I believe since 2.3+, embedded videos in all the WordPress sites I look after had suddenly disappeared! The embed / object code seemed in place, but what in fact seems to have happened is that the GUI editor munched up this code preventing the videos from even appearing.
The solution is to turn off the default visual editor in your user profile and re-embed all those vids, in particular the EngageMedia pieces as the WordPress media embed tool only supports a handful of providers such as YouTube, Google, Flickr, etc.
Ahhh – another reason I’m happy that I do not use the visual editor. I’ve found that those types of things create more hassle than they’re worth.