Putin is sticking to his same plan and says it in his opening statement: "The subject of this address is the situation in Donbas and the course of the special military operation to liberate it from the neo-Nazi regime, which seized power in Ukraine in 2014 as the result of an armed state coup." Russia must now play defense as they are no longer simply battling Ukraine.
Putin stated that in 1991 the West prided itself on dividing the USSR, and believes "now is the time to do the same to Russia, which must be divided into numerous regions that would be at deadly feud with each other. They decided these plans years ago."
Putin knows that he is fighting a NATO offensive and not simply Ukraine and directly calls out Washington, London, and Brussels. He correctly stated that the West first set out to demonize Russia and spread "Russophobia," as they did during the Cold War. NATO and the West are now the opponents of Russia in this proxy war, while the Ukrainian people are merely cannon fodder used to usher in this new world.
Putin has been trying to reclaim land since 2014. He had no plan to seize Ukraine, but did want to reclaim the Donbas. This is much bigger than Russia v Ukraine as he fears he must act on the offensive against most of the world's superpowers who want to seize Russia. They are shoving endless funds into Ukraine because they expect a prize in the end. Putin stated that he attempted peace talks, but the West shot them down because they craved war.