Using the computer version of videoscribe, you can import an SVG, png, jpg or gif from your hard drive. click the folder in the lower left corner of the "add image" menu to search your hard drive.
In other words, save any images you wish to use (assuming they are free to use), to a folder on your hard drive, and then you can import them.
using the ipad app, you can import an image from a direct URL on the internet.
also from dropbox: http://help.videoscribe.co/support/discussions/topics/1000068655
-Mike (videoscribe user)