Here are some timelapses I've found so far. They show you in a nutshell how you should expect the AI to act. All the clips have the Historical AI Focus enabled.
1939, ends in somewhat of a stalemate:
* There's some very weird shit happening with Vichy France early on, Germany donating random tracts of land to the fallen frogs or something?
* Molotov-Ribbentrop Pact fires after Poland is fully annexed, Soviets never join in.
* AI frontlines tend to be very dynamic, it seems like geographical barriers don't really have any effect on stabilising the front.
* AI also likes to use HoI3 cheese tactics, funnily enough. A few times you see breakthroughs of one cavalry or light armour division sprinting through the enemy heartlands. I'm not sure how effective they would be here, but in HoI3 this would cripple enemy supply lines.
* Mighty Turk army manages to survive German occupation with one province worth of Kebab Points.
1939, long war, but the Nazis are beaten in 1948:
* Molotov-Ribbentrop Pact fires after Fall of Potato again, but this time it seems to then lead into instant Barbarossa.
* In a strange twist, we have a Hungary going rogue and siding with the librulz, all the while sparking the ire of Axis Yugoslavia.
* France pretends to lose to Italy, only to launch a switcheroo attack on the Italian peninsula out of nowhere. And it almost worked, too.
* Soviet Union turns against the Allies halfway through the war, which proves to be its downfall, as the Purple Phoenix rises again.
* Kwa decides to stage C-day from Sevastopol itself and breaks the Germans' backs.
1939, Nazis on the brink of victory but Balkan invasion puts the dream to an end:
* No Vichy France, but more shenanigans going on with land donations to Italy out of nowhere.
* How the hell did they funnel enough troops through Greece that they managed to tear the Nazis apart in weeks?
* Molotov-Ribbentrop Pact fires after Fall of Potato yet again. I don't mind this being an option but
why do the Sowjets never carve out eastern Potato!?? I'm starting to suspect that they can't code the Soviet attack without bringing them into the war against France and England as well. Spaghetti code for dinner, kids!
* Borders look like crap.
All in all it's standard Paradox fare for game launches, so I'm not terribly disappointed.