What would this moving point of light be?
This sounds like a satelite to me. Satelites can also "dissapear" right above you, since the sun no longer reaches them and they fade into darkness.

Also 2 minutes is very well possible for a satelites to be visible that is in earths orbit.

You should also know, that there are hunderds of other satelites that can be as bright when observed from earth as the ISS is.