one workaround is to manually download mp4 video files. Url is
http://av.adobe.com/devnet/livecycle/lci3d/1-1-1.mp4http://av.adobe.com/devnet/livecycle/lci3d/1-2-1.mp4...http://av.adobe.com/devnet/livecycle/lci3d/2-1-1.mp4http://av.adobe.com/devnet/livecycle/lci3d/2-2-1.mp4....and
so on