I'm tired of running around in circles with hughesnet, myself. Thought, maybe.if I jump in on this stage of the issue with someone else, maybe it will get resolved.
It may be best to create a new topic so that Hughesnet can focus on your specific issues and problems as they may be different and have a different root cause.
Have you tried pausing, or turning off, the Video Data Saver, which when on, which is the deafult setting, deliberately throttles the speed of the service to such that is amenable to SD when streaming?
Keep in mind that streaming in HD uses a LOT of data. Also, you mentioned On Demand. If you're doing so through a satellite TV receiver, especially a DirecTV receiver, it's not recommended, as the receiver itself can, and often does, use data for things other than On Demand viewing, and can wipe out your monthly allotment of data in short order. Therefore, it's recommended to not even connect a satellite TV receiver, especially a DirecTV receiver, to HughesNet.
We definitely want to help you get this resolved and the most direct way to do this is to help you in your own thread. If @GabeU's recommendations do not resolve your issue or you have more questions/concerns, please create a new post in our technical support category with some more details such as the devices you are using, time of day the issues occur and any troubleshooting you've done so far.
This post was resurrected from last year but unfortunately we did not receive any response from the original poster last year, so this thread will be closed. If anyone still has questions or concerns please create a new thread in the appropriate category.