I'm looking for pictures before & after tv calibration. Mostly black&white like movies "Belfast" or "C'mon C'mon" from difrent tv brands (Panasonic, Sony, Samsung, LG etc.).
There would be little value in photos like that because both the camera used to take the photos (especially smartphone cameras which are known to enhance photos to make them more eye-catching) and the phone/monitor/screen used to view them will each affect how the original TV picture looks, with regards to colour, contrast, white balance etc.
Only way this would be even slightly useful would be to exaggerate before calibration in actual physicall photos you're holding and give examples of inaccurate brightness, gamma, colour, tint, red/green/blur push