Are there any security cmeras which are fiited with motion sensors, as that those will start filming only if there is any movement?

Answer 1

There are a number of cameras that have motion detectors. Cisco offers wireless network camera that do what your asking.

There are motion sensor securtiy cameras. These cameras begin filming when they sense movement and stop when the motion ceases. It can save lots time when reviewing footage since there wont be hours of empty footage.