I was looking around YouTube and came across this fantastic travel documentary done by the BBC:
Great Railway Journeys - Zambezi Express
Michael Wood starts in Cape Town then goes on through the Karoo, Botswana, Bulawayo, Wankie and ultimately ends up at Victoria Falls. This documentary shows a glimpse of railroads and life in the de-colonization of Africa from perspectives of whites and blacks.
There are TONS of steam engines in this 1 hour show, I highly recommend giving this documentary a view!
Bryce