A production diary is a live account of the making of a film for promotional purposes in the form of a video podcast. Production diaries follow different aspects of movie production while they are happening. Web-based production diaries are a new way for film makers to publicize their productions as they are being created, rather than when they are released (the old-model of film marketing).
Examples of current web-based production diaries include:
References
Production diary Wikipedia(Text) CC BY-SA