A:AnswerIf the Nook app is through Google, it's a lot easier to "hack" the tablet to allow Google Play apps. Take a look online and you'll see it's pretty easy.
A:Answeryes to both, you can store music and videos, as far as cloud goes, amazon has its own cloud for music, you store up to 250 songs. but no video. you can stream the music from amazon music
A:AnswerYes, it is an Android O/S. You can add apps from the Amazon store or the Chrome store if you add 4x Chrome programs for the latter. Google to see how to do it.