The GDC clip is basically him talking on others people work completely unrelated to what he's supposed to sell. High five!
3D artist Bryce Szandro released his hard surface kitbash set featuring 20 pieces that can be reused in many ways. The pack includes original Max and Zbrush files for you to edit the models.
You are free to use this kitbash set and modify it how you wish for personal and professional use.
You can also email the author if you have any questions or suggestions.