Learning how to edit when a video starts can be useful to perfect the flow of a presentation. This can be either when the video is clicked, or when the slide comes up in the presentation. Here is a screencast and guide to keep you up to speed.
Step 1 - In PowerPoint, select the video you want to edit by double clicking the added Video in your slideshow.
Step 2 - In the tabs section, select Playback then next to the box entitled Start select either Automatically, or When Clicked. This setting can make or break many presentations, so make sure to always remember which option you’ve selected to keep you in the right flow.