It's done in two steps, first use loom to record the mouse movement in much higher res than needed and then use resolve to zoom, follow and frame as needed.

> to record the mouse movement in much higher res than needed

how can this be done? if the monitor resolution is say 1600 x 900, how can it record the frames and/or mouse movement in higher resolution than this?

I've a 4k monitor and we publish 1080p videos.

Record at 4k with loom - that gives you mouse cursors. Then edit in Davinci to get the zoom effect