my understanding is that kylintv requires only 700 mbps to run and gektv is almost 1.5 mbps to stream. you should know these numbers are minimum spped required for streaming. For kylintv goers, I would think you should have at least 1 mbps and no less then 2 mbps for gektv to avoid buffering. hope this help.
PS. just to be sure, you can run a speed test at different time during the day to see how fast is your internet connection. Normally the traffic is heavier (slower internet speed) at night time when more users are online. There are several sites where you can run the speed test. www.speakeasy.net is pretty easy to use.