In general, on Hughes satellite we can watch videos, but not movies during prime hours, because we have a 20 Gig/30 day allowance. Between 2 and 8 am we get an bonus allotment of another 20 Gigs, so we try to schedule software upgrades and other large downloads during the night (easy to do on either Windows or Linux). Towards the end of the cycle, if we have a lot of allowance left, we'll splurge on a Netflix movie. You can either buy or rent the Hughes equipment, and there's a 2 year contract for new installations. After the 2 years, it's month-to-month. I think Hughes advertises 4G speeds, or up to 15 kbps down and up to 1000 kbps up.
Note the words "up to". YMMV.
A lot of people have trouble playing on-line games on Hughes, but that's largely because of the 50,000 mile round-trip of the signals. Ping times are high compared to wired internet. I'd imagine 4G has faster response also.
Standard installation is usually 'free' (included in the monthly bill), but you have to pay extra to have the dish mounted on a pole instead of on your roof.
Hughes has several plans -- the more you pay, the bigger your allowance, but speeds aren't improved much if at all.
If all else fails, you can live without the internet. I've lived most of my life without it. :D