From Apple
2. 3 Performance: Accurate Metadata
Guideline 2.3.4 - Performance - Accurate Metadata
Your app previews include content that does not sufficiently reflect the app in use. Specifically, your previews:
- Show footage other than the app in use.
Next Steps
To resolve this issue, please revise your app previews to only use video screen captures of the app, narration, and textual and design overlays.
Resources
For resources on creating great app previews, you may want to review the App Previews page. For more general information on how to make the most of your app's App Store product page, please see the App Store Product Page information available on the Apple developer portal.
It would be appropriate to address the encountered issue to comply with the Guidelines.