[Original Link] Ed Felten's splendid lecture on understanding digital media and the

associated copyright issues.  You don't need any knowledge of technology to understand this one.
An issue Ed doesn't touch on, which should also be exercising the minds of the media industry, is that content of this quality is freely available on the web, and is certainly better than anything on offer on my TV channels tonight.  There's always been good stuff to read on the web.  Increasingly, there's a lot of good stuff to watch, too.
Thanks to John for the link.