Your tutorial on Google Presentation was easy to understand the different aspects of the presentation application. It was easy to follow, especially since your cursor was highlighted the entire time and the large arrows were pointing toward important features. The assessment at the end highlighted the main points that you hoped users would learn about by watching your tutorial video. I think you hoped users would be creating a presentation while they were watching the tutorial, so maybe making that more clear in the beginning would be my suggestion to make the tutorial more interactive.
Some of the assessment questions were not fully shown on the screen or were cut off. Also, my video paused itself frequently during the video. I think you were hoping the users were completing the steps as they watched, but the pauses were not always at the appropriate places. You might consider having users manually pause if needed.