I can't honestly claim to have paid attention to the whole interview and followed all of his rambling, but he seemed to express in the Tucker interview that he views Ukraine as traditional/rightful Russian territory. Tucker was trying to lead Putin into the claim that the invasion was prompted by NATO doing NATO things (which is the talking point favored by right-aligned American commenters, who want to somehow blame Obama/Biden foreign policy for the war), but Putin just wanted to talk about shit that happened centuries ago.