Not all Samsung TV's are fully compatibile with the TWC TV app. If you follow the link below, you can verify if your TV model is supported for the TWC TV app. Link: http://www.samsung.com/us/appstore/app/G00009313465-compatible#
Unfortunately, If the TV is not listed then it is currently not supported on the TWCTV app. The best way to get a consistent picture and sound with that TV would be to add a set top box. If you have additional questions, please let us know.
^TWC - Social Media Customer Care