jtara - 3:56 pm on Sep 30, 2007 (gmt 0)

Although not there yet, the web video world is converging on MPEG4. Support is is a beta version of Flash.

Downloaded .mp4 with a suitable player would seem to give you a good degree of future-proofness.

(Supporting Flash will require some minimal conversion, because Flash will want it in a .flv container. But it should not require actual transcoding - just packing into a different container format.)

Is it really important that users be able to view the videos online? These are your own salepeople, who will be doing this again and again - not casual users who will only view one video. It seems to be that making the videos available for watching online (as opposed to downloading) would encourage unnecessary wasteful use of resources.