Some great startup pitch videos from Founders Institute. All of these people really seem to have been trained to be succinct and to the point and to cover the primary bases while leaving enough room for questions from an investor and to elicit interest. What I really like looking at is the distinctly different ways they all pitched, while still being sure to cover the primary issues of importance to Angel, Venture Capital, and other investors.
This one is my favorite presentation oriented pitch:
This is my favorite demo pitch.
Go see the rest on the Founder Institute site.