In this video, I show the footage in question. The major part of the movement of his jacket is caused by a semi rigid plastic hose holding an attachment (with mass) at waist height, being moved away from and back towards him. The contact causes the jacket to naturally ripple and flex.
The video also highlights a bulging of his jacket, at the back and on his shoulder area. In itself a clear sign that the jacket's Earth weight does not pull the air out, but rather, a lack of weight holds it in place.
His arms are vertical and against the bulkhead above him, to counter his natural upwards motion in zero-g whilst jogging. This is effectively transferring his inertial motion from one direction to another in a short space of time and repeatedly.
I highlight the flexing of his body, his laterally twisting torso, and the upward and downward motion of his legs.
All of this activity creates air movement, though slight, that also has a contributary effect.