By taking an ordinary metal coat hanger and bending it just right I am able to use the seat-back in front of me and a view screen. The result is a very comfortable viewing experience. I have used it already on several flights.
You start with a piece of coat hanger wire about 10 inches long. Fold the wire in half. Then bend the wire again to form a pair of “legs” with the las quarter in turned up for the “feet”. Now you can adjust the angle of the “knees” to set your viewing angle. You set your phone on the “shins” part of the legs.
Now take the back part of the contraption and tuck it into one of the folds of the headrest in front of you. If there is no headrest you can add an additional bend upwards and hang the gizmo off the toggle that holds the tray table up.
Now you can enjoy your movie and the optimal viewing height. If you checked out seatguru.com before you left they you have seat power to keep your iPod charged for the whole flight.
I’ve been looking around for such a commercial product and I have not seen it yet. The closest I have seen so far is the http://gorillapod.com.