that definitely sounds like a defective unit.. Only time I ever had mystery vapors were after the hint was used, and I know that it was just resins from my flowers. Return for a new one?
I don't do videos, but I do use my coil quite a bit. It is more harsh but I always have water with me so it's no biggie. Cleaning is a breeze and this thing IS extremely durable. Give it a go, it is cheap.