Lessons from the Great Depression from free2trade. It runs about 9 minutes.
An overview of the Russian Revolution from Khan Academy.
Lenin's Economic Policy and War Communism
Short biography of Stalin from Biography.
Fascism and Mussolini from Khan Academy
Short biography of Mussolini from WatchMojo.com
Short bigography of Hitler from Bigography.
This TedEd video from Alex Gendler and Anthony Hazard is awesome. Its called "How did Hitler rise to Power."