Watch the feeder, handover and bottle neck separately
Use close views to see whether pumps separate cleanly, retain orientation, transfer without the tube catching and approach the neck squarely. A wider view should show bottle pitch, accumulation, line stops and the relationship between feeder and capper.
Check what happens outside steady running
Useful trial footage includes replenishment, a normal stop, controlled missing-bottle or missing-pump conditions, jam clearance and restart. These events show whether the sequence remains controlled and whether recovery creates unmatched bottles or closures.
Connect the video to an acceptance record
Label footage with the bottle, pump, component batch, machine configuration, setting, run time and measured output. Record quality results separately. Slow-motion or frame-by-frame clips can support diagnosis, but the approved result should remain a written test record.