The UK makers of a documentary about the innovators of Silicon Valley have decided to release their film for sale online – free of DRM.

In Search of the Valley offers a unique insight into Silicon Valley, the hub of the computer industry.

The documentary follows three friends who visit the valley, securing exclusive interviews with some of the men who helped lay the foundations of modern computer technology.

The film features interviews with: Apple co-founders Steve Wozniak and John Warnock; Macromedia co-founder Marc Canter; O'Reilly Media founder Tim O'Reilly; and Craig Newmark of Craigslist.

The well-received film has only been available on DVD until now, as the producers were unhappy with the various DRM solutions available to them for selling the film online.

They claim that following Apple CEO Steve Jobs' public criticism of DRM last month, they took the decision to release the film online without DRM restrictions, "giving people who want to watch the movie the chance to do the right thing," they say.

The film is being made available through the Streamburst service.

There's no DRM but there is a five-second introduction added to the beginning of the film, which features the customer's name as it appears on their credit card. A unique fingerprint is also added to each copy of the film sold, which can be traced if it's made available through peer-to-peer networks.

The film and extras are available in various download formats for viewing on HDTV's, computers, portable players and multimedia mobile phones.