This page is a saved file, which the iPhone won't run. Open evc-raw-intake.pages.dev in Safari, then Share › Add to Home Screen.
Pick the car and follow its shot list. Each shot shows where to stand and what to do. Tap Open camera and film, film, tap Use Video. The clip is saved here, played back and checked for you.
Send all opens the share sheet: pick AirDrop and your Mac. Every clip arrives named by its shot. Clips stay in the app until you delete them.
Tap Send shot log, AirDrop it with those clips from Photos, then run match_clips.py on the Mac to name them.
Film it now in the Camera app (swipe left on the lock screen, or open Camera). Come back and tap Done after you stop recording.
Hands, a reflection, a slight tilt or someone in the background are all fine.
Saved inside this app on your phone. Tap one to play it, save it to Files or Photos, send it, or delete it.