The Vikings have made appearances in two major films by Cromwell Video: The Viking Wars and King Alfred the Great. I'm not sure about the latter, but here's the order information for The Viking Wars:

Cromwell Video

USA & Canada
$29.95 + postage (Maryland residents add 5% sales tax)
1-800-285-4952
or
Campaigns in History
Sturner & Klein
11900 Parklawn Drive
Rockville, MD 20852 

Rest of the world (minus the UK)
£14.99 + postage
(44) 403 261554
or
Campaigns in History
PO Box 142
Jubilee Estate Foundry Lane
Horsham, West Sussex RH13 5FJ 

The UK Not available from Cromwell Video. I believe you have to go through W.H. Smith's, for which I don't have any information.