A quick web search showed me this german page Zufallszahlen aus der Webcam ("random numbers from the web cam). (All other hits on the first Google result page are about an unrelated Pistonless rotary engine).
This page speaks about a program available from the same site, which tries to gather entropy from a web cam and produce "real" random numbers from this.
From the linked page (I didn't try to read the source code), the program tries to extract the electrical noise from the photo sensors by calculating differences between following frames, then assembles the difference bytes to blocks and hashes each of them with MD5.
The size (and thus number) of these blocks is adjusted for each difference frame from the measured entropy (but it isn't described how this is measured) and also dependent on some adjustable factor.
The idea to use electronic noise from a web cam as entropy input sounds good. Of course, I would like to see a more theoretic analysis of the entropy which can be gathered, not just statistic tests (there are cryptographical awful RNGs which pass all statistical tests), and I would use a more sound cryptographic processing of the data.
From the cryptographical side, I wouldn't use MD5 for this, but a newer hash function like one of the SHA-2 family. While the broken collision resistance of MD5 is not a problem here, other then when your adversary can plug in its own device and feed arbitrary bits instead of the images, it is just bad for your reputation to use MD5 for anything security-relevant.
I would use an entropy pool design cryptographic random number generator. The entropy from the web cam would be added to the entropy pool, this pool mixed using pseudorandom functions, and then the random numbers extracted by another pseudo random functions. There are standardized constructions for this.
But as D.W. said, there is still missing quite some analysis (how much entropy do we actually get from the differences?, for example), and justifications for the crypto around this. So I wouldn't yet recommend using this for any productive use.