I can’t open HEIC pictures, at least not yet.
You can use GIMP to convert/view the files
Very cool. Which camera are you using? It seems not the borescope type with semi-rigid cable.
The camera is from Lailongp. I bought it on Amazon. It’s a 3 in 1 Borescope 3.9mm Waterproof Endoscope for Android Phone/Windows PC/Mac