You can find tutorial videos on the INSTANT ANSWERS page. Here is one that explains how to publish your scribe video to powerpoint:
On the "publish" menu (shown approximately 35 seconds into the video), the powerpoint icon is the red icon with the white "P" beside the youtube and facebook icons.
-Mike (videoscribe user)
I've succesfully exported to Powerpoint but the file is so huge I can't share it. Any ideas? Thank you x