I agree. But as someone very interested in how physical things work, I can't help but think the video we were shown of the creation is not of the actual shreddi

I agree. But as someone very interested in how physical things work, I can't help but think the video we were shown of the creation is not of the actual shredding device ultimately used in the painting. Blades like that don't bend very easily. But if that is the case, why? Why make an additional fake video of how the shredding mechanism was created in addition to what was really used?