The minimum required connection is 5Mbps = 5 Megabits per second for download. You should make sure that there are no other devices actively using your network and that you have the strongest signal possible.
To test your connection please go to http://beta.speedtest.net
There is also a SD/HD switch at the bottom of our web player you can use if you experience buffering. The video in the FITE app will adjust automatically.