To cover all four sides of a 65-inch TV with the Philips Hue Play Gradient Lightstrip, you can use two Lightstrips, one for the left and right sides and another for the top and bottom. Alternatively, you could also consider other Philips Hue products such as the Hue Play Gradient Tube or the Hue Ambiance Gradient Lightstrip, which are more flexible in their arrangement.