All Gen5 plans offer the same speed. When your plan data is exhausted, your speed will be throttled. With this said, as of recent, and due to people being home, they've increased the speed of the service for those who've exceeded their plan data, but it's not back up to the speed level of when one has plan data.
Also, right now, because of the incredible strain on the system with so many people being online and the high level of congestion as a result of it, streaming may be difficult. And if you're out of data and your speed is throttled, streaming may be even more difficult.
With all of this said, if you do still have plan data and you're having difficulty with the streaming, you can start a new topic in Tech Support to get help. In order for the reps to help with speed issues, they'll need some speed test results from testmy.net. The instructions for those speed tests are here. Please be sure to read the instructions thoroughly before running the tests. After you've run some tests, please post your testmy.net "My Results" page URL in that new topic you created so that the reps can view your test results.
Due to the pandemic and so many people stretching the satellite system to capacity, streaming has taken a big hit, and it's likely not going to get better any time soon. There is likely not much, if anything, that HughesNet can do for you at this time when it comes to streaming. You can try to pause the Video Data Saver, but there's no guarantee this will help you during this time, and it will also eat up your data allowance very quickly, so it's not really a long term solution. If you have non-satellite internet options in your area, you may need to consider those.
We haven't event nearly reached our data, and it continues to buffer. Its super annoying. We cant even watch a whole movie with out it stopping every 5 seconds. And we thought that going from the 20 to the 30 might help also. It dont, save your money. Haha! I just think it is just an expensive amount of money to pay for a service that doesn't really work.
As an alternative to streaming, you may want to look into PlayOn Cloud. Your chosen streamed item is recorded to a cloud based DVR, then converted to an mp4 file, which you can then download manually, automatically or by scheduling. You can then watch the item on any device that can play mp4 files, which most can these days, including Smart TVs directly from a USB flash drive or USB external hard drive. There's no buffering because you're watching it from an already fully downloaded file. The file also never expires.