A: 

Not surprisingly this has been asked before: http://stackoverflow.com/questions/54423/best-net-podcasts/393209#393209

In regards to video There was ArchCast.tv (now part of channel 9)

http://channel9.msdn.com/shows/ARCast_with_Ron_Jacobs/

Jonathan Parker
+6  A: 

channel 9 ( all sorts of videos )

MSDN How Do I Videos for C# ( only c# related )

Chris Richner
+6  A: 

Suprised to see that DimeCasts hasn't been mentioned already - short (around 10 minutes), focused and high quality. Recommended.

Bevan
+1  A: 

For Windows Forms and WPF:
http://windowsclient.net/

For ASP.NET Web Forms and ASP.NET MVC:
http://www.asp.net/

Lucas
+1  A: 

http://www.ScreenCastADay.com

azamsharp