Michael Crichton directed seven films; six were major feature releases and one, the first titled Pursuit, was a television movie. I was able to find five of the seven trailers on YouTube, and I also found a scene of Crichton's final film. Unfortunately I was unable to find anything from his first.
1979. The Great Train Robbery
1989. Physical Evidence ; the trailer wasn't available, but this nifty little scene was.