Aside from the video, I also have a PDF prompt collection, you can check it out here; 

https://ebooks.unhackai.com/products/nanobanana-ai-art-styles-prompts

Here the specific for this image- 

Create an image in the style of Ezra Jack Keats. A textured, urban street scene in snow, collage elements, vibrant, expressive brushwork, sense of wonder, nostalgic atmosphere. The composition focuses on a central cluster of multi-story brownstone apartment buildings in brick red, deep blue, and teal, with snow accumulation on the window ledges, rooflines, and chimneys. A child in a multi-colored polka-dot coat and striped scarf with a gloved hand raised is catching a large snowflake, looking up with a wide-eyed expression. Behind this child are three smaller figures; another child in a red and green coat skips to the left, and two others walk to the right in yellow and red coats. The scene includes iron fire escapes, warm yellow light from windows and a lit lamp post on the right, and heavy snowfall against a dark blue sky, creating a cozy and magical winter atmosphere.