I was searching through Polish learning videos on YouTube and I happened across this really well animated history video about the struggle for independence from 1939-1989. If you like Poland or WWII then I recommend giving it a watch. P.S. The narrator of the English version is Sean Bean.
English Version (YouTube): https://www.youtube.com/watch?v=Q88AkN1hNYM
Polish Version (YouTube): https://www.youtube.com/watch?v=M7MSG4Q-4as
Official Site: http://www.theunconquered-movie.com
I prefer the older one, although there's nothing spoken here and the events shown might not be clear to those who had never been learning Polish history before.
(It's not 100% accurate if you focus on the details but it's meant to present the spirit and meaning of the history and historical events rather than to be accurate to the bone).