demobook

Edit YouTube thumbnails with Gemini

Demo summary

The creator walks through upgrading a low-quality video screenshot into a thumbnail by prompting Gemini to change his expression, add studio lighting, and insert a phone into his hand.

Step-by-step

  1. Upload a screenshot from a video to the Gemini interface
  2. Prompt the AI to add studio lighting to the image
  3. Request a specific change to facial expressions, such as 'smug and confident'
  4. Prompt the AI to insert an object, like a phone, into the subject's hand
  5. Instruct the AI to adjust the depth of field by bringing the object forward and blurring the background

Options

  • Change specific facial expressions
  • Add or remove objects from the scene
  • Adjust lighting styles
  • Modify focus and background blur

Tips

  • Use Gemini to upgrade low-quality video screenshots into high-quality thumbnail assets
  • Iterate on the image by asking for specific scene setups or setups that were not in the original shot

Highlights

this is incredibly powerful for generating your own thumbnails

All demos from “50+ INSANE Ways to Use Google Nano Banana! (BEST AI Image)

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  7. 18:530:57Edit YouTube thumbnails with GeminiCurrentThe creator walks through upgrading a low-quality video screenshot into a thumbnail by prompting Gemini to change his expression, add studio lighting, and insert a phone into his hand.GeminiAI Inpainting
  8. Watch “50+ INSANE Ways to Use Google Nano Banana! (BEST AI Image)” →

AI Inpainting

  1. 1:580:39Preview hairstyles with Gemini 2.5 FlashThe creator shows how to use Gemini to modify a person's hair in an uploaded photo, demonstrating a buzz cut and long blonde hair transformations.AI Samson
  2. 18:530:57Edit YouTube thumbnails with GeminiCurrentThe creator walks through upgrading a low-quality video screenshot into a thumbnail by prompting Gemini to change his expression, add studio lighting, and insert a phone into his hand.AI Samson
  3. 2:040:52Iterative image editing with Nano BananaThe video shows how to refine a generated image by changing the text on a sign and adjusting the lighting/weather conditions through follow-up prompts.Kevin Stratvert
  4. 2:490:12Edit an existing AI image with natural languageThe user demonstrates how to modify a generated image by providing a follow-up prompt to make the sunset more dramatic using Nano Banana's editing capabilities.The AI Advantage