The Idea Window
YouTube Mockup Generator
Preview a linked thumbnail project as it would appear on YouTube-style surfaces.
The YouTube Mockup generator previews how an Idea and linked thumbnail project may look in a YouTube-style layout.
Open it from the Preview Mockup button on the Idea Window's Thumbnails tab. First, choose one of the thumbnail projects linked to the Idea.
Bluprint uses the selected thumbnail project's derived cover URL. In practice, that means the strongest final or current thumbnail image becomes the mockup image.
After selecting a project, switch between homepage feed and watch page layouts, desktop and mobile sizes, and light or dark mode.
Use the mockup to judge title length, thumbnail clarity, and whether the Idea reads well in a realistic browsing context.