There is a great podcast, The History of the Germans, that have a season on the Hanseatic League. Its a great podcast if you enjoy history in general, the host isn't a professor or anything, but he does a great job with research and also makes interesting connections with how certain events were interpreted by German Nationalists, Fascists, Modern Day, etc. which is interesting.

https://historyofthegermans.com/hanseatic-league/