I don’t remember if we ever linked up the total weight and volume to the product attribute. We used to calculate total weight and volume based on data collected on the containers (pallets) but we deprecated the feature used to define containers.
In any case I’ll review that and see if I can fix the issue.
So I did some research and realized that the video you linked was based on a feature branch that was never merged into our develop branch. The video was recorded to solicit feedback from the user who requested it, but we didn’t receive a response so the feature is withering on the vine, as they say. I think it might need a bit more work to make it production-ready, so let me know how important this is and I’ll see if I can get it done in the next few weeks.