Phil... (... and anyone additional that has interest...)
On the home page, in the "User-contributed Documentation" section, there is an entry entitled:
ExifTool Tutorial ( video in 4 parts by AVPreserve)... with a URL of http://www.avpreserve.com/
It appears that the Company has undergone a name change of sorts and now refer to themselves as AVP and have the URL www.wearavp.com.
The video files still exist, however they are now located in the https://www.weareavp.com/resources/ directory.
Phil... sometime when you're kicked back in your chair sipping a Margarita... you might update the link info if you are so inclined.
Thanks for letting me know. I'll do that as soon as I get a chance.
- Phil
Link updated.