This works well with a camera tripod. Place it in front of the bed, angle the tripod approx. 40-50° so that the image is roughly overhead, rotate the image and it fits ...

In theory, yes. But ventilation must still be guaranteed. I project on the abrasion wall. There's not such a big picture quality penalty.

Hi, I wouldn't use the ceiling because the fan and plug are there. Perfect against the white wall unit!