There are some great animated visualizations and general how-to videos linked to in various questions and answers on this site.
I noticed that on some other StackExchange sites (e.g. Gaming, Music) they allow YouTube videos to be embedded and thought this might be something we could benefit from as well.
Can (and should) we enable that feature on GIS.SE? I think video is an important medium for both visualization and as a learning tool in GIS.