My cricket wireless hotspot wont load any videos 100 percent, why?

I use Cricket wireless hotspot on my phone to acess the internet through my phone. The problem is that when I go to sites like youtube and try to view a video-it will never load 100 percent. I have done all I can think off. I have paused it as soon as it starts to play to try and let it load but still it will only load 25-90 percent. Also lowering the video quality will not work. I have also just tried using a video dowload program like "antvideo" to just download the video but I get the same result, it stops at 25-90 percent. Why does it do this and can it help it. Also it is not that I am low on data I stilll have 2GB left before they turn the high speed off.