Joe,
You speak of "runout error" when adjusting the side focus. Runout error could show up when wiggling the eyepiece, or wiggling a front objective. But you were fixing the camera location and the scope putting it in and out of focus to see if there was a poi shift. That could show some parallax error, but the correct way do do that is to put it in focus and then move your eye or camera side to side. Scopes with shallow depth of field can have significant poi shifts when out of focus, but should have none when snapped into focus. Those scopes with shallow depth of field are not really problematic, and are even preferred by FT shooters. Hunters may prefer a deep depth of field where the scope stays in focus and is parallax free. Scopes that have parallax error even when in focus are more of a problem, but you did not show that.
Reporting on parallax error from a "head bob" (or camera-bob), at various focus settings, would be much more useful when trying to determine the suitability of a scope.
If you have a variable mag scope and have it on a low mag setting and out of focus, a head-bob will often reveal parallax error. It might have a bearing on the suitability of a scope for a particular task, but it has little bearing on the scope quality.
You had done a review of the Monstrum 6-24x50. You showed it with severe "runout" in your review. I used one recently at the Sonoran Desert GP field target match. The so called "runout" was never an issue. As long as I made sure it was set for clear focus, there was no poi shift. Of the four piston shooters, I had the top score, using a scope that you had deamed to be a worthless POS.