User blog comment:Harold Burned-Mane/The Truth about Ulfric Stormcloak/@comment-17114085-20130915041616/@comment-1600847-20130915161226

"Skyrim was betrayed, the blood of her sons spilled in doomed struggle against fate. And so in death, too late, I learn the truth - fed by war, so waxed the power of Alduin, World-Eater - wisdom now useless. By gods' jest in this grim mist together snared, Stormcloak and Imperial, we wander hopeless, waiting for succor."

I don't know what video you're referring to, Zipper, but this is his Sovngarde dialogue. He says the war helped Alduin. He never says the war helps the Dominion, true, but it he does say it helps Alduin.