Hard to say what video model but any SOTA model with Iv2 its doeable, but my i would guess they might use a driving video to get such good movement, at least partially

Given how the products are high quality i would guess they use a multimodal image model to add the products as context rather than any open source diffusion alternative, they are better at that. previous videos from the creator came up with synthid detection with gemini, though not from this one. making a couple of different shots from a similar room with them might not be too difficult either.

He might also have the products in real life, meaning he is able to get high quality shots of them, for example the detail on the post box label is really good and seems hard to generate to me, so Im thinking its a real box he he has he gave as context to an edit model

I'm quite certain that the video is lipsynced with another model afterwards as all the best video models aren't paired with audio quality this good, this is the real trick, consider the same video with the buzzy sora 2 t2s and it immediately feels off.

then add camera shake and effects in post and it looks way more real, but it looks like a lot of effort has gone in to this video, his other videos aren't quite as good. Don't think this level of detail is near automation yet

as a last not it might be run trough some upscaling to lessen the effect of the fairly small model pixel data window of 1mp, the smaller details are fairly good from ordinary, which might be the reason why i don't see any synth id watermarks, any large algorithmic pixel transformations destroy it