The Past of Nations 

Countries in this video:
USA (United States of America)
British America
Italy
Kingdom of Italy
Roman Empire
India
Mauryan Empire
Türkiye
Xiongnu
Germany
German Empire
Tunisia
Carthage
Romania
Dacia
Mongolia
Mongol Empire
Netherlands
United Provinces of The Netherlands
Iran
Achaemenid Empire (Or The Persian Empire)
Serbia
Serbian Empire
Hellas (Greece)
Byzantine Empire (Eastern Roman Empire)