One of my favourite multimedia tools to use is Jing. It is a very easy to use tool that can be used to conduct screen captures and screencast videos with audio. I use this to explain how to navigate a website or online course, since you have the ability to pause the recording, switch screens, and then pick up where you left off seamlessly. With the free version, you are limited to 5 minutes, which forces you to be concise, and actually keeps the videos more engaging. The paid version offers more video formats and editing capability.