This FIFA document...
http://resources.fifa.com/image/upl...cup-russiatm.pdf?cloudid=ncvjqwzuqeags9uqac4r
Indicates FMA appear to be only a marketing organisation and so would need sublicencees to do the work
TV2U say Indosat Ooredoo have the OTT rights. It would seem pretty stupid to say that if they didn't, so I feel pretty sure it's true.