Video surveillance of one's own property during house construction

That’s why I would also be relaxed about the situation. If something gets stolen, it’s the developer’s problem.

The problem of the developer or the craftsman will quickly become your problem if they cannot afford replacements or if the materials have delivery times of weeks or months.
Sure, financially they have no claims against the builder... I still slept poorly when the windows stood for almost 2 weeks right on the street in front of my shell construction... or when steel reinforcements worth the price of a small car were lying around for weeks.