There’s a brief shot about 2:40 in the video where you can see the arrestor hook sticking out slightly behind the bottom of the rudder. The bit it’s sticking out of is a fairing replacing the bottom few inches of the original rudder, and was attached to the hook.
Griffon-engined Spitfires/Seafires can be easily identified from the earlier and more common Merlin-engined types by the prominent blister fairings at the front top of the cowling, added to fit the slightly larger engine without major changes to the cowling shape.
Note that the four-engined bombers shown briefly in one of the wartime scenes are USAAF B-17s, not German bombers.
I feel really bad because I surely walked by it and didn’t realize what it was. I vaguely remember waking by it and wondering how many different planes had scoops like the Spitfire.
I didn’t know until this thread that there was a carrier version.
Found a cool videoexplaining the hook. The original one dropped down from the fuselage but they went to a stinger version. The pilot pulls a lever and it drops down and extends out. It hangs loose and the fairing keeps it lined up even if the plane is crabbing in to land.