I just rewatched the clip and at no point does the fuel point start flashing red and when they untick fog of war you can see its already capped. Also his cutoff wasn't taken, the one youre referring to is south base cutoff. Rewatch the video, his cutoff is in vision almost the whole time and no enemy squad touches it that I see.
You will probably only see the territory flash IN GAME. Not spectating a replay. So it does not flash in the video.
The point where Seeking is making bags touches the south fuel and south cutoff.
The south cutoff was already taken before the fuel is taken. So Seeking would have known at 1:25 game time that there is a squad to his south west (cutoff) and to his south (fuel).
The southwest squad can either go to the mid VP or the point Seeking is on. A smart player would converge their two squads at the point Seeking is on (to out number the enemy). Because they would also see a flashing territory and know Seeking is there.
If I was Seeking I would have pulled back probably earlier than he did. But he may have been looking at something else or was waiting to see if the mid VP area started flashing.
The problem is WE dont have the replays, so we have these spectate games where the operator is flashing the FOW on/off. You have no context as to what happened before that may have been a clue to Seeking. And how can we expect Seeking to remember every detail of games from a week or two ago??? I dont remember 15 minutes ago
