EMBEDDED YOUTUBE PLAYERS built the easy way using the handy code on the YouTube are actually invalid HTML. If you care about building valid web pages, try this solution. Worked great for the Patrick Stewart video player below.

Also, MichiBlogger uses the Amputator plugin for Movable Type to properly encode ampersands (the '&' symbol). Ampersands are quite common in URLs. If you build web pages, you should build valid web pages. (Just don't check my pages at Murdoc Online...)