The 1394 Trade Association (www.1394ta.org) recently started a series of Firewire informational videos on YouTube. These are like "video FAQs", not full fledged tutorials. However, these videos are not made by "self-proclaimed" experts but by the 1394 Trade Association, so you are guaranteed that what you will see and hear is accurate.
Surely the 1394 Trade Association has "promoting 1394 technology" in its mission statement, but it is not a marketing organization. These videos are not marketing material, but answers to common questions about Firewire.
You can check them out at: http://www.youtube.com/user/FireWireExpert
Currently there are only a few, but if there is enough traffic then the 1394TA will decide to invest more time and money on this approach. Surely enough, you can understand that it takes much more time to prepare a video FAQ than typing in 20 lines of text on some web page.
Also don't hesitate to email them your questions, if you happen to have any.