I have encountered the same problem in the previous version as I am having in this latest version. It has to do with morphing. There is a black box that appears during the morphing process. I used a .PNG image. Following the examples you give in the tutorial with the cup and with the Superman character, I wanted to zoom on a big of corn chips I started with the smallest bag, copied and expanded it, changed the drawing, pause and transitions to 0:00, set the second image to morph, with drawing time at 1/2 second and 0:00 and 2 seconds none of which worked without the black box. Attached is an example.
When VideoScribe morphs an image it uses all the lines in that image to morph. Also, when VideoScribe imports a PNG or Jpeg file it creates an invisible line over the top of the image (this is the line the pen follows when drawing the image) which is what you see when morphing this image. The morph function is designed to work best with SVG images (such as the images in the VideoScribe library).
I've attached a scribe file which gives an example of how you can zoom in on a image that has already been drawn without using morph.
You can set camera positions on individual items.
In this case the second items (arrow) camera position has been set to Zoom in on the crisp packet.
This gives a zoom in effect of the Crisp pack.