Video and audience: [the actual subject and viewer]

Thumbnail type: [video / Short / podcast playlist] | Upload device: [desktop / mobile]

Canvas: [width × height in pixels] | Ratio: [aspect ratio]

Visual promise: [what this image accurately shows] | Heading: [optional short wording]

Small-preview check: [subject and text remain understandable]

Export: [JPG or PNG] | Actual file size: [MB] | Applicable limit: [verified limit]

Review: [correct video, accurate title, permissions and no private information]

Final upload preview: [result] | Reviewer and date: [name/date]