Try some online tutorials for tips on planning your presentation.
This series of Microsoft tutorials gives information about planning your presentation, formatting text and images, adding audio and video, animation, tables, and sharing. Don't have free Microsoft Office on your personal laptop? Click here for download instructions.
Have you tried Prezi? The public online account is free and here is a beginning tutorial to get you started. There are other tutorials at prezi.com/support.
Another free, web-based tool for image and short (5 minutes) video capture is Jing. Basic visual elements such as arrows and lines can be added to images for emphasis. Your video could be embedded in a PowerPoint.