If you mean streaming movies and TV then must not do it in HD, do it in SD or even better low definition. The service is capped and you will eat through all your data in a hurry if doing HD. Regardless what definition there is still a limit as to how much you can do per month based on your plan.
Are you over your allowance for the month? Are boxes at the top of page green when you go here: http://192.168.0.1/ ?
Thanks for posting and welcome to the community! Can you elaborate a bit further? I'm also curious to know what services you are using when trying to perform these tasks. Satellite internet can be limiting, however i'm sure we can provide some insight and help you get the most out of your service. Hope to hear from you soon.