Adaptations of image style transfer specifically for video came out pretty quick after the image ones, and there's been a few iterations. For the most part they

Adaptations of image style transfer specifically for video came out pretty quick after the image ones, and there's been a few iterations. For the most part they use the same ideas, but add some extra steps to "stabilize" the result of the stylization across time so that it doesn't jump all over the place from frame to frame. For 3D, it's more complicated as there isn't an obvious translation of image-based stylization to the 3D realm - if we are talking 3D mesh models, I've seen similar ideas applied to generating textures as well as geometry. In this case, the novelty is combining the stylization with the NERF, which does result in a special type of 3D model (not a mesh, but a volumetric representation that lends itself well to rendering). There isn't really any video aspect to it, other than that videos of the result from different viewpoints are a good way of visualizing the result.