1. The video is definitely not a problem as mentioned above.
2. If you are unaware AND uncaring (meaning even if you were aware, you still wouldn’t care)then a light going on as you pass by is not a problem.
3. If you are aware, or you do care (like a sensor in your living room) , then there are poskim who permit activating it in your normal routine (you may walk around your living room normally)provided it is not a heat producing sensor. There are poskim who forbid this even if the sensor is not heat producing.