As clearly indicated, this module requires Zend. This is because in order to use the YouTube API, Zend is required. If it could be done in a simpler way, I would. But as it stands this is the only module that allows you to show a random YouTube video from a specific YouTube user account. Why is it the only one? Because you have to use the YouTube API to achieve this, and that requires Zend when using Linux/Apache/MySQL/PHP.
I don't believe that killed the rest of your site though. If you uninstalled the module, it should be back to normal.