Examples to make your own
Your idea
A tutorial on organizing charging cables with reusable ties. Show one neatly coiled cable; leave space for text.
A more useful prompt
Landscape 16:9 thumbnail base image for a cable organization tutorial: one neatly coiled charging cable secured with a reusable tie, clearly isolated against a simple contrasting background. Use a large readable silhouette and reserve empty space on the left for a later text overlay. Do not render lettering or invent a before-and-after result.
Your idea
A video comparing a paper notebook and a tablet for handwritten notes. Show both with equal visual weight.
A more useful prompt
Landscape 16:9 thumbnail base image split into two clear areas: a paper notebook on one side and a tablet on the other, both representing handwritten note-taking. Give each equal visual weight, consistent light and simple backgrounds. Reserve a clean upper area for an editorial text overlay. Do not add scores, winner badges or unsupported performance claims.
Start from the actual video
Describe the topic and the one visual idea viewers should recognize at small size. If choosing comparison, name both subjects and explain the difference shown in the video. Keep the composition simpler than a poster and avoid an unsupported before-and-after claim.
Check clarity, not promised clicks
Review the finished image as a small thumbnail: can you identify the subject and read the overlay? Keep faces, objects and results relevant to the video. This tool does not predict click-through rate or guarantee more views; compare your own published results later.