thecoalman - 5:03 pm on May 25, 2010 (gmt 0)
You could address the speed/bandwidth issue to some dgree by simply linking to them. Another option would be to make it a user preference in the control panel with the default being a link. Most forum software uses a thumbnail anyway.
As the saying goes an image is worth a thousand words, often when I'm looking at video questions I could explain something with an image that may otherwise never be clear even after a lengthy explanation.