You're right to say there's no camera can shoot in NO light condition.
But videocam is different. SONY videocams come with the Night Shot Plus and Super Night Shot modes which allows one to shoot in the night under NO light condition. No other makers here have this feature. They uses a special IR pass filter for 0 lux night shooting and NO visible light source is needed. Hence, for night shooting this is very useful as it'll not scare away the creatures in the dark. One downside is its greenish in color. NV binos use IR illuminator to achieve this effect.