Some of his statements are true but other false :
Poland did prepare a defensive war against Germany long before the war happens :
Poland wanted the war to get East Prussia, Danzig and all land east of the Oder
Poland did not have the means to oppose Germany.
That s why all Polish ships were sent to United Kingdom before WW2.
Poland knew their fleets would be destroyed at the start of the war so they had better chance to do damage abroad with UK.
Hitler provokes war at the polish-german border. Hitler needed a casus belli to start the war with false flag operation :