Mozilla posted a new video on YouTube that offers a fresh, up-to-date look at its forthcoming mobile operating system in action, PC World reports.

Recorded last Thursday, the video — embedded below — demonstrates the latest build of Firefox OS running on a developer phone by Chinese manufacturer ZTE.

Built using HTML5, the operating system is intended for use on smartphones built entirely to open Web standards, where all of the device’s capabilities can be developed as HTML5 applications.

Operator partners in the effort include Deutsche Telekom, Etisalat, Smart, Sprint, Telecom Italia, Telefónica, and Telenor. The first devices featuring Firefox OS will be manufactured by TCL Communication Technology (Alcatel) and ZTE using Snapdragon processors from Qualcomm, Mozilla says.

The operating system is also looking pretty intriguing as an Android alternative.

The New York Times comments: “The smartphones going into the world’s next two billion pairs of hands may not belong to either Google or Apple, but to Mozilla.

“The Mozilla Foundation, which oversees open source software projects like the Firefox Web browser, expects to release a mobile operating system for smartphones early next year. Its target market is Latin America, then the rest of the developing world, where smartphones from Apple and Google are still too expensive for most people.

“The Firefox models will be one-third to one-sixth the cost of the competition, according to Mozilla and its partners.”