In my humble opinion, your video is lacking backgrounds. A lot of.
I know it's easy to go into the direction, everybody goes in, which is in general: Germans (and allies) were the bad, the rest was good. Please don't misunderstand my words here, as I don't want to justify the history. War is always a bad thing, but it's important to understand the reason of wars. (Because this is a very complex topic, I only want to bring up some points, which are significant in my opinion.)
You missed the statement, that Germany didn't start the war because they were all mad or evil. I studied many historical documents and talked to a lot of people about that. My conclusion was: Poland provoked the start of the war with their behaviour against the Germans on their territory. (Which was heavily supported by the UK.) This goes hand in hand with the fact, that Poland received parts of the old German Empire unlawfully. (As it's against the Hague Convention respecting the Laws and Customs of War on Land.)
I could talk for hours and bring up a lot of more facts, but I think this would be wrong here.
My only wish would be: please look at both sides before creating such propaganda.