How do I download a media player for my nextbook tablet?
Which model of nextbook tablet you have? Is it the one that support Google Play or does not? If the model supports Google Play, you can install either MX Player, VLC Beta or Real Player from https://play.google.com/store/search?q=media+player&c=apps&price=1 . If the tablet model does not support Google Store, you should be able to access an alternate android store like Amazon Android Apps Store as follows:
Installing : http://www.amazon.com/gp/mas/get/android
Apps Store : http://www.amazon.com/mobile-apps/b?node=2350149011
For any further help contact NextBook Support at http://www.nextbookusa.com/techsupport.php
You can download and use several app markets, including 1MobileMarket http://market.1mobile.com/m/?cid=&from=pcmarket201404, Amazon App Store http://www.amazon.com/gp/mas/get/android, SlideMe Application Manager http://m.slideme.org/sam, and several others. The Amazon app store has free app off the day and other deals to get paid apps for a deep discount or even free. Also, some apps come with coins, which can be used on the next app purchase or for in-app purchases within a game downloaded from the Amazon app store.