This is rich. The Vision Realm gait animation is garbage, yet the skeleton overlay on Bob H is "accurate". All discrepancies are chalked up to "foreshortening".
One question: How can you tell that Bob's humerus bone is foreshortened, and not just shorter than Patty's? The skeleton overlay can't tell you this. Especially comparing 2 frames with different body positions and distances from the camera.
The foreshortening effect is the cosine of the component angle made by the humerus bone away (or towards) the camera. But the skeleton is just a 2D overlay which is forced to fit and foreshortened accordingly.
The problem here is that the skeleton's arm is artificially foreshortened to match up with Bob's arm. But that doesn't prove Bob's arm is actually angled from his body. You have to assume it is, which you can't, and this makes the skeleton overlay invalid. This is just another software model misused as a measuring tool with hidden methodology.
Here's a novel idea, why not measure Bob's arm and see if it's foreshortened instead of claiming that it must be? As Sweaty noted, the skeleton overlay suggests that Bob's arm is approx 18% more foreshortened than Patty's. (Patty's arm must also be foreshortened to some degree). Bob's right arm from the shoulder joint to his finger tips should be approx 40% of his height (confirm this on yourself). Below is Bob's standing height est by his body length (4 vectors). I measured 40% of this est along the arm, and IMO, there is very little foreshortening to consider. Bob's arm is swinging very close to his body. If Bob's arm was actually foreshortened by 18%, then it would be angled more than 30 degrees from his body (toward the camera) and it would look more like this.
So if Bob's arm isn't significantly foreshortened (relative to Patty's) then this implies that Patty's arm is longer than Bob's, which is reflected by the skeleton overlay. That is, if the skeleton overlay is valid.
How come the experts aren't screaming that the skeleton comparison is not scientifically valid? Or are they saving up for Bill Munns Report?
