I’m currently building a website, and I would really like to receive events from the webcam based on head movements (agreement, denial).

I’m trying to make an application that identifies plant diseases but I have a problem that it uses the phone’s front camera instead of the back camera, so I need you guys to help me fix it. I tried facing mode but it’s not working , so i really need u help rightnow because i have an exam in next 4 days