Your method has certainly flooded our screens and computers' bandwidth, not to mention FR's. All for what you can't see?! Well then, feast your eyes on what your eyes can behold, if you will but see!
Since you seem to be a visually-oriented person, try the following graphic on for size:
Start with 11: Notice how JK and Dolliana stick out copiously from both sides of the seat. From the image sticking out on the left (with no motion) to the image on the right (again, with no detectable motion) is 19 frames in a 30fps video, that is, just over half a second. If JK had done that, his timing would have had to been 100% in sync with FP's quick camera motion, which would have had to have been FAR more than a coincidence.
Back to picture 1. JK is seen to the left of the headrest . My estimate is that where his head would be extends to the right, into no more than 25% of the headrest. Yet, off to the far right, we already see Dolliana's red/yellow (as you say, because of the light) peeking out to the right under the headrest. Its apparent edge against the light is not vertical as it would be if it were the adjoining edge of the window and cabin; it's angled left-to-right downward. The two different persons' images are too far distant from one another to both be JK at the same time!
2. We note the manufacturing ridge artifact commonality with BB's requested helmet and neck brace. The arrows goes to picture 5 to show the same ridge line on Dolliana's helmet.
3. Note how another fleeting frame of what is clearly Dolliana's hair contains the same color as in picture 1 above.
4. JK's cap doesnt have the extended vertical component of Dolliana's at its lower edge, thus, it's not the same.
5. Dolliana's helmet shows no ponytail that we know JK had.
6. "The hand" floats purposelessly through several frame. It physically cannot belong to anyone whose feet are on the floor. None of the three (JK, RK, FP) that have any chance of having a part of their body in that space could physically have their right hand there. It dangles from above! It's well manicured and pudgy, just as Ms Fuddy's was, two rows forward. Throughout this section, FP strangely keeps his camera's from rising from more than 30degrees beyond straight down. It's as if he studiously and in pre-planned fashion didn't want the camera lenses to see anything higher than that. Showing everybody in a full view of the commotion of the cabin at least for a moment or two would certainly have been any videographer's more natural "inclination."
7. Jake is the first to exit the craft, but instead of walking down the ladder ("into a swimming pool," as FH would later say), he strangely jumps the white railing on the left and swims over to hug the starboard side of the fuselage. It's as if he's trying to hide something from the camera's lenses.
8. Only one frame catches Jake poised there, but there's Dolliana, peeking over Jake's right shoulder! Ironically, if Jake had worn his life jacket out of the plane as the pilot reportedly had instructed all the passengers, such a life jacket would have hidden Dolliana's forehead, eyebrow and red hair entirely. There's really nothing else it could be. There wasn't anything reddish like that that "just coincidentally" was floating around in the water!
9. Having handed off Dolliana to the others that were at the crash site, Jake swims without a life jacket to the rear of the airplane, where supposedly there's nothing to hold onto. But as is usual throughout the aftermath, Jake keeps his peripheral vision if not his direct eyesight trained onto the videographer and his cameras.
10. Jake will often interpose himself between the cameras' lenses and "things happening" with Ms Fuddy in a way that simply could not have happened in random fashion. Seeing how the climax of the exercise is that Ms Fuddy will be replaced by a diver (see post #247 for details), Jake's work as a visual obstruction to what goes on around Ms Fuddy is yet another dead give-away of the planned nature of the entire exercise.
In sum, the many markers of pre-planning that the passengers' preparations, choices and actions betray should convince even the most skeptical and working-cross-purposes DU-fan that lurks around here of the nature of this intricately planned hoax.