There is a firmware update being pushed for My Book Live that you will need to accept before the camera icon shows up. It uses a new service called wd 2go. If you are using the MioNet service you will not be able to upload. The primary reason is the wd 2go can communicate peer to peer with your iPhone / Android WD Photos app allowing you to push large videos in your local area network directly to your MBL. WD TV already does this as it never used MioNet.
After you accept the firmware, you will need add a new device (select MBL). It will ask you for an activation code (click the Guide Me button in the upper right hand corner which shows you how to get the code from the MBL). The new MBL will then have the camera upload button. Videos go into Shared Videos/your phone name and photos in Shared Pictures/your phone name.
Note: After upgrade, if you were using MioNet the old drive under mionet will no longer work - so either logout or remove that drive from MioNet (if you still want to use MioNet for the older drives such as My Book World Edition).
Hope this helps.