Altium 15 BGA Fanout option is not working fully
I found the fix. Actually from the video the OP only changes one sub-rule named Fanout_BGA (red circle in the above pic) under Fanout Control rules. 

But the next important sub rule named Fanout_Default needs to be checked and make sure the Fanout Style is set to BGA. There are 4 types of Fanouts and each Fanout has their own set of rules to be defined and finally only one can be used as default and which is where we've to set the Fanout_Default to any one of the styles before applying.

Hope it helps.