American 7.2 TDs:
Rotating turrets
First 4 TDs are very fast and with cardboard armour
The next 2 are slower and more armoured
Worse guns, lower DPS, lower camo value than turretless TDs
Hellcat gets 72kph top speed
T28 Prototype turret rotates 286 degrees, not 360
T30 had its turret traverse and armour nerfed, but the gun is a little more accurate

New physics demo (physics is in supertest stage):
Climbing hills and coming down from hills are significantly different
There are still unidirectional locations (jumping off cliffs)
Tank drowns and is destroyed after 5 seconds in water

Non-game content:
Tank-related cartoons (starts at 10:05)
Miss World of Tanks contest

Notable video comments:
"With physics implemented, half of the team will never make it to the enemy."
"For the first few battles, nobody is going to shoot anyone, there will just be a huge line of people ramping off cliffs."
And, of course the mandatory 400 "I would do Olga Sergeyevna so hard" posts.