Using J and K keyboard shortcuts to move through results pages is visually jarring at the moment.
Improving this will help usability and accessibility.
At the moment, every time J or K is pressed the highlight correctly moves to the next search result, but the page moves at the same time, and since the results are a mixture of normal results, sub-page results from the same domain, videos with thumbnails, etc. they vary in height.
This means that instead of the highlight being in the same fixed position in the viewport where your eyes are already settled, the highlight position actually moves around, causing the user to have to visually hunt for where it has gone to next.
A stronger/clearer default highlight/cursor might help as a quick fix, but I would propose that it's better that the page doesn't scroll at all after a single keypress, and instead only reacts when the highlight gets near to the bottom end of the viewport. At that point, it should scroll an entire page length and highlight the next topmost result (and then repeat the behaviour above).
This is more akin to how, say, a word processor app works as you move through it with a keyboard line by line. Unless you're using a distraction free writing tool in typewriter mode, as you move the cursor through a document, the entire document doesn't move at all until the cursor is towards the end of the visible area of the page.
Mimicking this would make following the highlighted result much clearer to follow instead of having to readjust and hunt for where the highlight has slightly moved to after every keypress.
