De or het videotelefonie?

The correct Dutch article is:

de videotelefonie

How to use videotelefonie

the videotelefoniede videotelefonie
this videotelefoniedeze videotelefonie
that videotelefoniedie videotelefonie
our videotelefonieonze videotelefonie
your videotelefoniejouw videotelefonie
every videotelefonieelke videotelefonie
which videotelefonie?welke videotelefonie?
a big videotelefonie / the big videotelefonieeen grote videotelefonie, de grote videotelefonie