Directv On Demand pre loads movies and TV shows... Liz the official Rep on here indicated that to me. On Demand will kill your data unfortunately as it sounds.
We're glad to have you here! Thank you for taking the time to post and offer some positive comments. Since you mentioned getting DirecTV, be careful with the OnDemand service, as that will use a LOT of data.
Here's a good start to finding more positive threads about HughesNet!
I'll defer to any community members here who've played The Division for their experiences.
We're here if you need anything.