I think this was good document in overall, when you are obsessed with something (like in this case swords), the documentaries usually fall a bit short. Had to watch it on youtube, don't know if it was a country problem at PBS site.
You must remember that the document is meant to general public, not for us sword nuts alone. There are some points that I don't like, but I understand they will appeal to general public.
Why there is a katana in the beginning? And comparison to bastard sword? At first I thought oh crap... but fortunately after the bad start it turned out to be a fascinating document. But I guess you need comparison stuff like that to appeal the masses.
I wish they would have gotten more Ric and forging in it.
But after all it was only 60min documentary, and they had to try to cover the subject as widely as they could.
I think we have little under 30 Ulfberht swords in Finland from the sources I've read. Finnish archeologist Mikko Moilanen has done excessive study of them as well as other viking swords in Finland. He has made his graduation work focusing on blade inlays in viking swords. And has done seven swords that have blade inlays for experiments during that work using as close original means as possible. And I believe since that in 2006 Mikko has done many more swords featuring authentic inlays.
Here is a link to article on old archeology magazine where Mikko discusses the origins of the inlay work and how it possibly was done, several possibilities. Unfortunately for the 99,9% of you the article is in finnish...
But you can at least see the pictures. Translating the metallurgy terminology into english might be a bit too hard for me, and I would make lots of errors in the process. http://koti.mbnet.fi/~arkeonyt/arkeonyt/AN%202006_3.pdf
Here is one picture of Ulfberht inlay in National Museum of Finland:
One good book that has some information about Ulfbehrt swords is - Swords of the Viking Age by Ian Peirce.