The video does not have to be professionally done. It does not have to be slick. You don't have to edit the video or do any processing. Just shoot the video as if you are talking to your colleague and send it.
Couple of things to keep in mind.
- The Tool: Use a physical video camera. Not a screen capture tool.
- Duration: Colleagues have told me that the limit for a video is 7 minutes or less. Anything more becomes a drag.
I have created tens to videos during the past 2 years to capture and convey my thoughts to my colleagues. Since those videos contain proprietary content, I cannot share them here. However, the video below, which I made for my personal use, conveys how I use video. Ignore the content. It talks about creating a mobile app using a drag and drop tool called App Inventor.
Video conveys emotion much better than an email. You can use informal language. You can show screens and physical artifacts quickly and efficiently.