I've been watching it regularly since the day of its launch. a while ago.

People complained quite loudly about a BLACK screen regularly...

Well a Black screen, is the ISS on the darm side of the Earth, over unpopulated areas and or the oceans.

Right now, they seem to have a bad camera feed internal to the ISS, as I get the error screen that is supposedly generated when communications fail on one of the cameras that it switches to.

Seriously though... this is exceptionally cool, during large thunderstorm fly overs and also fly overs of Densely populated areas at night.