~Grin~
Your sly use of ellipses gives away that you know darn well what the problem is.
Here are the words you excised in quoting me: "in the synced frames"
So! Compare the frame you have just posted with ANY one of the synced frames. See the difference in the position of the Lady#1's hand? That difference right there is why your argument is bust.

Friends, Mr. O'Meara's little piece of sneakiness gave the game away in the most amusing fashion.
The full sequence from Bell shows Lady#1 (the lady in black) move her hand
west to a point where it appears to be behind khaki man's head:

But! In the Bell frames that Mr. Davidson
synced with Towner,
she hasn't yet started moving her hand west. It is still appearing visibly east of khaki man's head. Nor is there anything in her hand blowing to her right (viewer's left) such as might make up the gap between her hand and the back of his head------------nope, we are at all times afforded an unobstructed view of the white TSBD stonework in the background:

And yet a waving object is
already making its appearance behind khaki man's head in the SYNCED Towner frames. Look at the last paused frame here:

How is this possible? Easy: the waving object that appears in Towner behind khaki man's head is coming from the doorway. There is no other rational explanation.
Had Miss Towner kept her camera on the doorway another couple of seconds, then Lady#1's hand might well have appeared in front of the object waving in the doorway. But the synced frames allow us to categorically rule out the fluttering coming from her hand as the source of the waving object in Towner.
So---------------after all Mr. O'Meara's blowhard huffing and puffing, after all his bad-faith gaslighting----------------we're back just where we started:
Red Shirt Man energetically waving a flag (or somesuch) at Pres. Kennedy:

