The landscape preview renders at 1920x1080 with a dark blue code-editor grid, teal rounded border, blue and gold accent circles, readable white quiz text, green topic footer, and the visible watermark Dev @diwazz • @diwaskhatri07 in the lower-right corner.
The Shorts preview renders at 1080x1920 with the same visual system and watermark. The title and hook are readable on the mobile canvas. The current renderer deliberately uses deterministic branded cards; it does not claim that these cards are AI-generated images.
Both previews were created successfully. The long-form preview is approximately 65 seconds and the Short is approximately 30 seconds. No music was present because assets/music.mp3 was not supplied; the renderer is ready to loop and mix a licensed track when one is added.