What are some good (preferably open-source) software for making illustrative videos to explain one's research? I am currently looking for software to make a small video on my research topic that could complement presentation slides. The video may not delve into all technical details, but should summarise all technical content in a compact and entertaining way.
A friend of mine who is very good at academic video-making says he only uses iMovies these days for video editing. He uses QuickTime to capture screen and audio recordings when he needs to.