Golka Ball Lightning video

[Stephen R. Lawrence]

I downloaded the 30Mb file http://www.eskimo.com/~bilb/GolkaBL.wmv but when 
I play it I get sound but, tantalisingly, a completely blank screen. Is 
this something to do with too much bandwidth being required? Can someone help?

Many Thanks!
From: Stephen R. Lawrence, 8 Supanee Court, French's Road, Cambridge, 
England, CB4 3LB.  Tel/Fax +44 1223 564373