Padding, corners and shadow

The same Background tab, under SHAPE and SHADOW. These are the settings that make a screen recording look like a product shot instead of a screenshot.

Shape

Padding is how much background shows around the recording. More padding is more dramatic and smaller text; less is the opposite. If your video has small type in it, pull this down.

Rounded corners rounds the corners of the recording. A little is modern. A lot starts to look like a phone.

Inset draws a thin light edge just inside the recording, with Inset amount for how strong. It is the detail that separates a dark window from a dark background so the picture does not bleed into what is behind it.

Shadow

Shadow turns the shadow under the recording on and off.

Directional shadow makes it fall in a direction rather than sitting evenly all the way round, with Distance, Angle and Blur to place it.

A soft shadow at a shallow angle looks like light in a room. A hard shadow directly underneath looks like a sticker. The default is the former.

A word on restraint

Each of these controls goes further than you should usually take it. The settings that look best in a still frame are often too much in motion, because the eye has thirty seconds to get tired of them. When in doubt, less padding, less rounding, softer shadow.

And if none of it is helping, Full frame at the top of the tab clears all of it at once.