Yea I guess not. I fall asleep watching videos. To this day it's very difficult for me to fall asleep unless there's some tv show playing in the background be it on an actual tv or a computer monitor.

Falling asleep in an office chair in front of a computer sounds even less healthy

Oh it is. You'll start having constant neck and back pains. Maybe a nicer chair would help. The worst thing is falling asleep in the office with those damn fluorescent lights on. I'm glad I stopped doing that.