In practice, WB918LA is not a common public model. More likely, it is a or board number used internally by HP for repairs. Your actual PC model could be something like HP All-in-One 20-c200, 22-c000, or similar Brazilian-market AIOs.
The HP Pavilion dv4 series was famous for its "MediaSmart" software and touch-sensitive media buttons. A modern feature for this driver would be Webcam Hand Gestures How it works: Driver Camara Web Hp Oem Wb918la Abm 1 23
Sometimes the driver is fine, but Windows privacy settings are blocking the camera. Installing HP drivers and softwares - Easiest Process In practice, WB918LA is not a common public model