Endoscope Camera with Light, 1920P HD Borescope with 8 Adjustable LED Lights, 16.4ft Semi-Rigid Snake Camera, IP67 Waterproof 7.9mm Inspection Tools for iOS and Android

You can buy a pipe/crevice camera from Amazon that connects to your phone. I find it very handy. https://www.amazon.com.au/dp/B0CZHT2VHS?ref=ppx_yo2ov_dt_b_fed_asin_title&th=1