You may want to look into Yamada Sensei's "Aikido: The Power and the Basics" series. The series is well done. The techniques are clearly demonstrated with commentary.
At aikidoonline, there are some very good DVD's by many of the Shihans.
I recently purchased the 2004 and 2005 USAF-Western Region (Birankai) summer camp videos and I am very pleased with their quality and content.