Here’s the video’s legend (from the video’s description):
Maroon: Axis Power members, their dependencies/colonies, and annexed lands.
Burgundy: Areas militarily occupied by the Axis Powers.
Red: Axis puppet states.
Pink: Axis gains during that day.
Blue: Allied powers and areas occupied by the allies.
Light blue: Allied gains for that day.
Purple colors (left to right): Finland, occupied by Finland, and Finnish gains that day.
Dark Green: The USSR before it joined the allies and annexed lands.
Green: Areas militarily occupied by the USSR before it joined the allies.
Light Green: Soviet gains for that day.
And here are some key dates to watch for (list courtesy i09):
September 1, 1939: Germany invades Poland (watch the Soviets move in to take their half starting September 17)
April 9, 1940: Germany invades Norway
May 10, 1940: Germany invades France
April 6, 1941: Germany invades Yugoslavia and Greece
June 22, 1941: Germany invades Soviet Union
November 25, 1941: The Battle for Moscow
July 3, 1942: Sevastopol falls to Germany
October 23, 1942: Battle of El Alamein begins
January 31, 1943: German surrender at Stalingrad
March 15, 1943: Germans retake Kharkov
May 12, 1943: Surrender of Axis forces in North Africa
July 10, 1943: Allied landings in Sicily (Operation Husky)
June 4, 1944: Rome captured by Allies
June 6, 1944: Allied invasion of Normandy (D-Day)
August 15, 1944: Allied landings in South of France
August 25, 1944: Paris liberated
January 17, 1945: Soviets capture Warsaw
April 13, 1945: Soviets capture Vienna
April 23, 1945: Soviets enter Berlin
http://youtu.be/WOVEy1tC7nk
