Why is my video cover photo not displaying correctly?

Topic summary

  • Central issue: A user’s video displays only a black screen with a play button. They added and saved a cover photo (thumbnail), but the cover image still does not appear.

  • Context: Tagged as a Shopify theme question. No further technical details provided about theme, video source, or implementation steps.

  • Outcome/status: No responses or solutions are provided; the problem remains unresolved.

  • Unanswered points: Whether the cover image was configured in the correct setting, if caching/CDN might be involved, or if the video/cover format and placement are supported by the theme.

Summarized with AI on January 4. AI used: gpt-5.

my video shows up as a black screen with a play button. I have added a cover photo and saved the file.
the video still shows up black no cover photo. what am I doing wrong?