Unless the 2015 3010 has a different mounting system from 2014 3010 the TV above the kitchen counter is mounted to a static mount and doesn't adjust at all.
The TV can be removed and there are directions here or on youtube on how to remove it, I can't remember where I saw the directions. The TV isn't mounted on an adjustable arm like the TVs that are installed in the overhead cab on some of the other models.
I suppose you may be able to add an adjustable arm but I'm not sure how secure it would be. Our kids just lay with their heads at the driver side of the overhead bunk and they can still see the TV pretty well.
2015 Forest River Forester 3011 DS - 2007 Dodge Durango Toad