[sorry analysing room flags is extremely time consuming and they make less and less sense as the game goes on to the point that there's no point in studying them, from here on out I'm going to spend a little less time analyzing them, you can always warp to the individual puzzles/events and analyze them in more detail that way]

(Note, row A uses camera angles at falls)

A1 = (1) Zombie bursts out of closset in Bedroom in Green Corridoor (music starts) (signifies closset is open?), (2) Dog jumps over fence at the outside Boiler, (3) after returning to Roofed Passage with Star Crest placed and Sun Crest in inventory = Chris
A2 = (1) Star Crest/Sun Crest placed in puzzle at Roof Passage (unchecks after piece has been placed), (2) Study Room Fish Tank Puzzle, while pushing full Fish Tank (checks when Fish Tank is empty, indication of ability to move it?), (3) Study Room Fish Tank Puzzle, after draining Fish Tank = Chris
A3 = (1) Chris looks at Book in Bedroom in Green Corridoor, (2) Study Room Fish Tank Puzzle, after draining Fish Tank, (3) checked at Rebecca's Syrumn run = Chris = Chris
A4 = Checked at Rebecca's Syrumn run = Chris
A5
A6  = Zombie that bursts out of closset in Bedroom in Green Corridoor dies (music stops) = Chris
A7
A8
B1 = (1) Camera switches to look at puzzle at Roof Passage when puzzle is selected, (2) standing next to the plant feeder in the Green House, (3) Armour Room Puzzle, far side grate is covered = Chris
B2 = (1) Plant dies after being poisoned in the Green House, (2) when you look at the dead body in the Pillar Passage, (3) Armour Room Puzzle, door side grate is covered, (4) Study Room Fish Tank Puzzle, standing beside the Fish Tank, (5) Standing in front of Crank Water Gate = Chris
B3 = (1) Armour Room Puzzle, button pressed? (2) standing in front of the Gold Shield after the Piano song = Chris
B4
B5 = (1) Armour Room Puzzle, hurt by poisonous gas?, (2) Study Room Fish Tank Puzzle, fish tank drains? = Chris
B6
B7 = Study Room Fish Tank Puzzle, Blinks when walking near to switch, book case and fish tank (checks when switch is pushed) = Chris
B8
C1
C2
C3 = Study Room Fish Tank Puzzle, light turns on? = Chris *(also used, Water Gate camera angle)
C4 = Water Gate camera angle = Chris
C5 = Water Gate camera angle = Chris
C6 = Water Gate camera angle = Chris
C7 = Water Gate camera angle = Chris
C8 = Activates Yawn and he emerges from his nest in the Attic (unchecks when Yawn has bee defeated) = Chris *(also used, Water Gate camera angle)
D1
D2
D3
D4
D5
D6
D7
D8
E1 = Water Gate camera angle = Chris
E2 = Water Gate camera angle = Chris
E3 = Painting Puzzle, option to flick the "Picture of People Mourning for the Dead" switch has been given = Chris
E4 = Painting Puzzle, painting swings anf falls on the floor = Chris
E5 = Painting Puzzle, "People Mourning for the Dead" switch has been flicked, puzzle failed = Chris
E6
E7 = Painting Puzzle, indicates puzzle has been activated (unchecks and rechecks after each selection) = Chris
E8 = Painting Puzzle, correct choice has been made, puzzle still active (unchecks after choice) = Chris
F1
F2
F3
F4
F5
F6
F7
F8
G1 = Armour Room Puzzle, poisionous gas? = Chris
G2 = Painting Puzzle (choice 5), correct choice has been made, Tired Middle-Aged Man has been selected (possibly points to next in cue, Bold Looking Old Man) = Chris *(also used when you stand in front of the Desk Draw in the Dressing Room) *(also used, Armour Room Puzzle, posionous gas?)
G3 = Painting Puzzle (choice 1), correct choice has been made, New Born Baby has been selected (possibly points to next in cue, Infant) = Chris *(also used, Armour Room Puzzle, poisonous gas, or puzzle failed?)
G4 = Painting Puzzle (choice 4), correct choice has been made, Young Man has been selected (possibly points to next in cue, Tired Middle-Aged Man) = Chris *(also used, Armour Room Puzzle, after completing the puzzle and re-entering the room, this flag is checked, no idea)
G5 = Painting Puzzle (choice 2), correct choice has been made, Infant has been selected (possibly points to next in cue, Lively Boy) = Chris
G6 = Painting Puzzle (choice 3), correct choice has been made, Lively Boy has been selected (possibly points to next in cue, Young Man) = Chris *(also used, Armour Room Puzzle, puzzle complete)
G7 = Painting Puzzle (choice 6), correct choice has been made, Bold Looking Old Man has been selected (possibly points to next in cue, People Mourning for the Dead) = Chris *(also used, Armour Room Puzzle, display cabinet opening?), *(also used, activates Yawn and he emerges from his nest in the Attic)
G8 = Painting Puzzle (choice 7), correct choice has been made, People Mourning for the Dead (possibly suggests puzzle solved) = Chris *(also used, Armour Room Puzzle, puzzle failed?)
H1
H2
H3
H4
H5
H6
H7 = Standing in front of the Boiler at the outside Boiler = Chris
H8 = When the camera angles change as you're looking at the dead body and crows attack you at The Terrace = Chris