Landscape thumbnails win the long-form feeds; vertical Shorts thumbnails win the Shorts tab, search and suggested placements where a Short is shown as a still. The 1of10 generator builds both from one engine with a single format switch, so you compose for the surface, not the tool.

Linking your YouTube channel trains the AI on your face, your thumbnail style and your niche, so every generation looks like your channel instead of generic AI. It takes about 30 seconds, needs no uploads if your face already appears in your thumbnails, and is the single highest-impact setting