It's very important to clear your apps that running in the background. If you are having streaming issues and buffing issues and your internet is running fine. Then it's most likely because you have too many things running in the background. Here is the instructions on how to fix it. 

Go to your
App Library
Search
Background apps and Process List
Download
Open
Force Close and do not click uninstall
Back Button
Next
After Done
Home Button 
Hold down the Play/Pause Button and Select button at the same time for 7 sec to reboot.

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After you download the Background Apps & Process List. Here is a quick video how to force the stop the apps.