Internet problems.

I having problems with my Tab Pro 8.4 Wi-Fi version. The thing is, that I can watch 1440p or 1080p60fps on YouTube without lag and loading, but while watching Twitch...... it becomes A NIGHTMARE.(it's not internet problem, I tried to watch for 10mins same channel on two devices, and only my tablet need to load sometime (loads for minute and you wait like 15-30s)) I don't know what this is, can someone help to fix this problem?
P.S. I tried to restart my tab and router