This is a chin mount for cameras with the GoPro style clip mounts. The helmet attachment is via velcro straps to allow easy and quick install/removal for use with things like helmets at go-kart facilities where you can't install permanent mounts. I recommend installing some sort of foam or other soft, grippy material to the back of the mount to prevent it from sliding or rattling around.
Print with supports from the build plate to properly support the clip wings, but everything else is fine with bridging. I recommend PLA+, high durometer TPU, or other relatively tough filament with 5-6 top layers and 4-5 perimeters for strength.
The author hasn't provided the model origin yet.