The video was good until you reached the middle of the vid. From the middle till the end you pretty fought a continoius battle with battleships vs battleships. At the beginning you should have bought dive bombers with skytrains to attack the shipyard. The bombers could have neutralized the shipyard. From there, the skytrain could drop troops on to the island. The problem with ships is that they move slowly so it gives the enemy time to build there navy.
codillon13 getting the montana is a DLC you have to get the mustang battle pack to get the montana and super yamato so yay thats how you get it i have the DLC to