What definition are you trying to stream in? Have you tried turning off, or snoozing, the Video Data Saver?
Keep in mind that HughesNet isn't designed for cord cutting.
Also, please keep in mind that your service is in a "relaxed bandwidth state" during the first twenty days, meaning your monthly data allotment is continually being replenished. After these twenty days your service will revert to normal and your data usage will start being counted. The relaxed bandwidth state is discussed in the Welcome email from HughesNet.
Right now in my town in CT, at 11:52PM, 9/17/18, my time of downloading about 100MB data from Norton Liveupdate is more than an hour, and counting. When I test from HughNet, it says downloading speed at 20Mbit/Sec, another site says it's 2.3Mbit/Sec.
Which is true? Need me to say?
If you need help with a speed issue, please start a new topic.
Regarding speed tests, some cause the Video Data Saver to kick in. Fast.com and Google's speed test are a couple that do this. Because of this neither are reliable unless the VDS is turned off when testing.
Testmy.net is the recommended speed test. A LAN connected device, while the WiFi is disabled, and using the manual 25MB size for download tests and the manual 4MB size for upload tests, is recommended, and required when troubleshooting.