Phil... this might be a long shot but definitely worth looking into. Franklin Groves recently purchased the portion of Faraway farm that contains the stud barn and office. Called Man O' War Farm it is located on Huffan Mill Rd and Russell Cave Pike in Lexington (as you must know!!) I visited there last October and met with farm managers Shannon (husband) and Dale(wife) Wolfsram. They mentioned how Mr. Groves was preserving the Farm and restoring it to look as it did when MOW was alive. Shannon took me into the office and showed me all kinds of MOW memorabilia. It might be possible that they can help you in your search. If I can locate the farm number I will email it.. otherwise, I called the Lexington visitors Bureau to obtain the farm's phone number as it wasn't listed thru the regular directory.
Good Luck with your search... Please let us know if you find the video... all of us who visit Beth's page would love to see it (I'm sure). What your grandfather and father must have seen!!?!??!?! WOW!