Embedding a YouTube video
There should be an embedded YouTube video above this text. I’ve found some screen capture software for Mac OS X and I am looking at using YouTube to park screencasts based on PowerPoint presentations with commentaries.
The video lasts about 90 seconds and shows the relative scale of Earth, the solar system planets and the galaxy. Harmless, but a lot of the material on YouTube is a bit scuzzy, so I’m looking at self-published alternatives.