Select clip at playhead track above or below
When a clip is selected in the timeline, use a keyboard shortcut to select the clip above it or a separate shortcut to select the clip below it based on the position of the playhead. Holding shift while pressing these shortcuts would maintain the current selected clip and add the subsequent clip to the total selection.
Steven Perry commented
Many of my edits are on "track 3" for a specific camera, but occasionally I want to select the clip directly below on track 2 to make an edit on that camera.
Having a KBSC option for this would speed up this part of my workflow quite a bit.