[rawling]

What's going on at the end of the game, where it looks like the black king is moving around without white doing anything?

[electrotype]

Aman premoves everything in the end, he is very low on time. Most platforms allow you to make moves in advance, and those are automatically executed after your opponent moves, as long as they are legal.

Here is a video explaining the whole game: https://www.youtube.com/watch?v=wPa0EhzvhaA

[rawling]

Ah, thanks, my confusion was I didn't realise the white pieces would stay in their end positions while all those premoves were being played out.