Give TV support a problem they can repeat
Send one example with the device model, app name, time and what you expected to happen. That gives a support team a place to start.
Describe the first step that fails
Say whether the player cannot open, cannot sign in, cannot find the programme or stops while playing. Include any error text as it appears. Note one other programme or app you tried on the same device.
Crop out account details
A screenshot of the error can help. Remove passwords, playlist URLs, QR codes and device keys first. Send it only through the support channel you intended to use.