Video and KM - Trade Secrets

While watching Trade Secrets on BBC2 today (a 5 minute show of top tips from industry experts - in this case theatre dressers), I suddenly realised what a great piece of knowledge management it is. I think video is often under-used by companies, and this sort of top-tip format could work beautifully in companies either for induction training or broken out into clips (with nice descriptive metadata) via an intranet. The benefits include the fact that the tip is mediated by a person (closest value to face-to-face), can be demonstrated in context (as a demonstration), and obviously can be stored for later retrieval. With the advent of low-cost DV cameras and editing, budget also shouldn't be an issue. Has anyone used this sort of video-based, Lessons Learned format within a company before?