No country is run by angels - Poland WAS flirting and double crossing the Germans. But I watched the whole thing - Putin didn't insinuate that Poland started the war - but played a part in it.
Poland was wanting to take parts of Ukraine at the time - that is a historical fact. Several countries have historical claims to parts of Ukraine. The point is that the histroy is not as simple as the West pretends it it.
The break-up of the Austria-Hungary Empire after WWI was a Cluster You-Know-What, it created multi-ethnic states which could not hold together.