I wish you all the best with Koln.TV, but trust me, it's a kind of typo.
German is my second language, and in other languages like English or French (my first language), it is called, as you mentioned it: Cologne.
German people will naturally type Koeln or Köln...
Please understand that I only try to help you
... Or I had regged it already
Sorry for my mistakes (proof that English is my third language)