I have created a calibration stick on one video because it has a ruler.  However, a second video that is the same size as the first video does not have the ruler.  Can I copy and paste the calibration stick from the first video to the second video?  I did try this and I thought it would work, except that the pasted calibration stick in the second video appears to have no length (yet has the name of the calibration stick from the first video).