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This is a round-up of the ways that you can add interactive elements to your videos.
Jing tutorial: Capture a video: Jing can capture and share videos (up to five minutes long) from your computer screen. Narrating a quick video is a great way to show someone exactly what you mean.
Jing is a free way to get started with recording videos (and making screen shots you can dress up a bit) After I felt comfortable, I moved up to their paid tool, Snagit. I don't work for them, just like their products..
The download is free and this seems to be quite an interesting tool but recording is restricted to 5 minute long videos. So am not sure how useful a tool like this would be.