Yep, that is exactly what I said. You can backup the VM to your VBR repository. What won't work (And maybe that is what you mean) is storing the data directly on the VBR repository from the solution itself since that VBO repository is not the same as a VBR repository due to the nature of the service. From the moment you have it on a VM, and back it up like any other VM, VBR will recognize that it is a VBO server and give you the possibility to restore that data.
Maybe there was something not clearly told in that presentation. Can you recall what presentation it was and I will have a look