I think the important posture issues are when you are relaxed, either reclining or sleeping. I sleep with no head lift at all. My pillow is just to support my head from the sides so my head does not roll off to the side too far. It takes a while to get used to no head elevation but it is worth it..

I also use head phones for TV and music. It allows me to focus on the program without being overloaded with ambient sounds. I suggest you try head phones or ear buds when watching TV/videos or relaxing to music. You might be surprised at how easy it makes listening. Your brain does not need to sort out the sounds.