That's definitely a White in the video. And I agree that Whites will travel great distances to warmer climes for reproduction purposes, which would include Hawaii. Some of the large females who frequent the Farallons have been detected as far away as the depths off Guadalupe and Mexico.
But I just think the kayak was being trailed by a nosy Tiger. Had it been a White, it likely would've been capsized from beneath.
The behavior and size is consistent with a large Tiger shark.
A White shark would not have spent that much time on the surface in the absence of bait or chum.
Tiger and Bull/Zambezi sharks are notoriously curious and subsequently more often dangerous to humans.