This indicates that Flash Player is not currently enabled in your browser for this site. To enable Flash, select the "Secure" button in the Chrome address bar:
In the latest version of Chrome, the site settings will open in a new tab instead of a drop-down menu. Other than this change, the steps to enable Flash are identical.
In the drop-down menu, navigate to "Flash" and set the list option to "Always allow on this site," as in the following image:
Once the page is reloaded, Flash will be enabled and the media player should appear. However, there are cases when Flash may still be blocked, and may need to be manually enabled on the page. On the right side of the address bar, select the Flash icon and choose "Run all plugins this time." Doing so should cause the video to load.