The best Tips way to use the KineMaster:

Overlay File:

Advantages

Only Overlay files will crops.
Only Overlay files make an increase in size and decrease the size.

Disadvantage:

We cannot speed increase the OverlayFiles.
We should choose the Overlay file after the  Mediafile.

Media File

advantages:

We can increase the speed of the video.


Disadvantages:

We cannot increase and decrease the size of image and video.