The light is definitely different in ways that we can measure. They are both in front or below your eyes and way dimmer than the sun which is the important thing for trying to optimize light for sleep. Again assuming you expose yourself to proper bright light during the day.
Content is why your TV keeps you up. Go ahead and watch Hardcore Henry with the worlds best blue light blockers right before bed and see how that goes for you. Next day watch something you find boring as hell with no blue light blockers and see how you sleep.