Earlier quoted context omitted.
No, it's not valid. At all. I think it is illegal in some countries and should be illegal everywhere. It was enough of these "practices".
If I swap out my car's engine with a more powerful one and screw up the drivetrain will warranty cover it? If I load broken firmware onto my device that screws it up, why should the company be on the hook? Replacing firmware is no different than replacing any other component. What countries force companies to provide warranty when users load faulty firmware onto devices?
This SDK seems to be for PC-based remote control apps, not camera firmware. A well-designed camera firmware would not accept remote control commands that exceed the hardware's safety limits.