Welcome to the board and thank you for posting a link to the Youtube video – what lovely clear water the wreck lies in.

Unfortunately, the parts you have photographed are common to pretty near all WW2 British bombers likely to be flying in that part of the world.

The brass plate refers to the Automatic Pilot Mk IV, not a Halifax Mk IV.

The other plate is from the Mixer box “Beam Approach” “InterComm”.

From the video, it’s clear you have found the wreck of a Merlin Engined aeroplane, probably a Halifax. The rest of the details are vague without something more to work on.