A:
My son has been using the Nabi 2 for about a year and it has been a great device. In Nabi mode, it has family friendly content. I even occasionally use it in parent mode (Android 4.0) for HBOGO, Netflix and Xfinity.
As far as downloadable content, if you have Comcast/Xfinity and a subscription to Showtime or Starz, you can download content directly to it. I have also downloaded movies on a PC and then transfer them to a microSD card. This can then be inserted into the Nabi 2's microSD slot and play movies this way. I am not sure about other items as we mostly stream content or I load movies onto a microSD card as described.