Here is a selection of videos created between July, 2008 and July, 2009 by members of the C# team at Microsoft:

• C# 4.0 Meet the Design Team: Anders Hejlsberg, Eric Lippert, et al
• Error Checking Feature in Visual Studio Service Pack 1: DJ Park
• Inside C# 4.0 - Dynamic Typing, Optional Params, Variance: Sam Ng
• Concurrency and Language Design: Anders Hejlsberg and Guy Steele
• The Future of C#: Anders Hejlsberg
• The Joy of Writing Code in Visual Studio 2010: Karen Liu
• C# 4.0 Video on Dynamic: Anders Hejlsberg
• Asynchronous Programming Power Threading Library: Jeff Richter and Charlie Calvert
• Expert to Expert – The Future of C#: Erik Meijer and Anders Hejlsberg
• Eiffel and Contract Oriented Programming: Mads Torgersen
• Eric Lippert Happy Birthday: Eric Lippert