I've never seen a whole channel dedicated to Diabetes. Some of the channels carry that show D-Life. What type of information did they talk about. There is so much bad information being put out by the media, I would be afraid of a dedicated TV station. I subscribed to several Diabetes magazines for the first year of my diabetes until I realised how much misinformation they were passing on.
They had one playing in my old Endo's office. It showed some cool stories like Jackie Robinson and his diabetes. They also had some cooking stuff. A few recipes looked good but most were high in carbs.