I am posting this video not only to fulfil Thing 12 but to seek feedback on the bringing the idea further. I keep procrastinating on what I truly believe might resolve many of the educational issues.
Here is the link to the YouTube video.
It took longer than expected because the audio recording function on Keynote kept stopping after 2 minutes or so. I only realise this after recording the whole presentation and replaying it. Did a few recordings before giving up. Others have faced the same problem too.
In the end, I imported the presentation to iMovie and then added the audio recording clip by clip. The quality of the video is not that good though but hope it suffices.