Who is the first person of famous position like first the president, Justice, Army, first Speaker, Everest winner, First Attorney General, First University, Bangladesh Bank's first governor, first Flag hoover, Director General of Women etc all about this first person of Bangladesh Country. It is published by youtube channel : Gk & Ca 3 https://www.youtube.com/channel/UCngEVXJU3c29o_yuuaSYckA
I think this help you to learn a lot of knowledge about Bangladesh.