The same clip costs more at a higher setting. That is the whole trade.

The habit worth building: run low while you are testing the idea, then re-run the one you want to ship at the high setting. Most wasted credits are spent generating drafts at final quality.

Everything defaults to 16:9, images and video. 21:9 is available for a wide cinema shape.

Cards take the shape of what you feed them. Connect media into a card and it inherits that media's aspect ratio, snapped to the nearest shape the model can actually produce. Drop a file onto the canvas and it is measured before it uploads, so the card is the right shape immediately.

Each flow remembers your last choice of ratio and starts the next blank card there, with a label like "16:9 matching this flow". It never carries into a different flow, and there is a Reset back to the model's own defaults.

A preset that declares its own shape always wins. Picking Movie Poster inside a 16:9 flow still gives you a poster.

If you pick a shape one model supports and then switch to a model that cannot produce it, the ratio resets immediately rather than failing at run time.

An extension pins to the quality of the clip it continues. The control shows "Matched to source" and the other tiers switch off, because changing tier partway through would give you nothing usable.

4K clips currently download at 1080p. The full resolution file exists, the download path is what caps it, and it is being fixed.