For some reason embedded Vimeo's are not loading on any devices with the exception of ipad. So far I've attempted a Nexus 5 running Android L, a 2013 Nexus 7 running Kitkat, chrome and explorer on my desktop.
They are inserted into the course via web object. We used a Vimeo PRO account and we've already selected the option "make video compatible for mobile devices"
Here's a link to a web export of one of the modules.