Much more difficult to distribute Video than it is to distribute audio. In USA most if not all B&O is not equipped for Video distribution, but my understanding is that all (current) B&O video distribution is analog. That is the distribution signal is analog, and the source from which the signal is drawn must also be analog.
Thus regardeless of whether you have ATV or ATV2, you would need to convert the signal from digital to analog, and distribute that. There are obviously other digital technologies that allow you to distribute a digital signal, but you will end up spending a lot more on the distribution system thant what it will cost you to have say an ATV2 at each TV (assuming your BVs all have a digital input).