Time Warner’s HBO, one of the few remaining holdouts from online video, is finally jumping into the bandwagon with a new video downloading service, dubbed HBO on Broadband. There are a few caveats though: you must either be an HBO subscriber or get broadband service from your local cable provider, and you must live in Milwaukee or Green Bay, where the company will first test the service.

HBO on Broadband will offer 600 titles and 400 hours of content, including movies, documentaries and original series. While most networks have embraced browser-based streaming video, HBO’s programming is to be watched in a separate PC-only application that downloads shows to the hard drive for a period of four weeks, after which it will get automatically deleted. No word on when HBO plans to roll out the service on additional areas, but they are reportedly is in talks with other cable operators to do so.