Democrats are statists, and as Trotsky observed, war is the health of the state.
Unfortunately, while the title is correct, unless the video is talking about stupid diplomacy in the 1990's (continuing to treat Yeltsin-era Russia as definitionally "the enemy", even though they'd lost the Cold War and were no longer trying to impose Communism on the world by subversion and force of arms, trampling Russian interests in the Balkans during the dissolution of Yugoslavia, NATO expansion) that mirrored the maltreatment of Weimar Germany at Versailles, thus making Putin's rise as a revanchist leader as inevitable as that of Hitler (or if not Hitler, someone from the Black Reichswehr), it's off base.
And, just as a historical case for laying the blame for WWII on the victors in WWI and their maltreatment of Germany, that case did not provide sufficient reason to stand aside while Hitler conquered Europe, so the case that NATO's maltreatment of post-Soviet Russia is to blame for the war in Ukraine does not mean that it is not imperative for the West to oppose Putin's revanchism.