RTL Télé Lëtzebuerg is the main television channel in Luxembourg, broadcasting in Luxembourgish.
The small television market in Luxembourg led to a unique system in Europe: Luxembourg was the only country in the world in which television stations were operated in both the PAL and SECAM formats. Originally, both channels carried the same signal, Tele Luxembourg. Later, the signals were split in the two independent stations RTL-TVI (PAL, system G, on channel 27, the "i" stand for independent), targeting the French-speaking part of Belgium and RTL Télévision (SECAM, system L, on channel 21), targeting France. Both stations initially continued to carry a lot of the same programming, with regards to foreign series and movies, but produced news and game shows for their target audience.
As restrictions on operating commercial television stations in Europe were relaxed in the mid-1980s, RTL-TVI moved entirely to Brussels, while the popularity of RTL Télévision was somewhat diminished by the success of M6. RTL Télévision was renamed RTL9 and, even though its original terrestrial frequency in Luxembourg remains, it is now primarily a cable station for France.
All these stations carried a program in Luxembourgish, called Hei Elei, Kuck Elei. The main purpose was to show these stations were essentially broadcasters from Luxembourg and not aiming to be commercial stations in Belgium, France and Germany. When the stations were licensed in their intended broadcasting regions, this program was dropped.
Today, RTL Télé Lëtzebuerg carries entertainment, magazine and news in Luxembourgish. Outside broadcasting hours, a live camera from the radio studio is broadcast, along with text news and traffic cameras. Programs from RTL Shop in German are broadcast a few hours a day, mostly in the morning.
(credits: wikipedia, obviously)