Here's the actual first frame from the Darnell film, taken from my lossless Youtube download and not a lazy Youtube screenshot

and NO the Bell Film does NOT SHOW WIEGMAN RUNNING, it shows a walking camera man at the bottom but not him running.
This is taken from a high quality 1080p version without the watermark.

Thanks for posting the above Bell Film still frame.
If you look at the frames leading up to this still frame and the frames following it, you will see that the upper body of Wiegman is getting closer to the ground at the end of these frames. Why? Because Wiegman is falling to the ground. If you think of Wiegman as being a Football Running Back, he mirrors a ball carrier falling Forward to the ground. Instead of firmly holding a Football to his chest, Wiegman is instead holding his camera to his chest.
Wiegman filmed the Newman Family at the bottom of the Knoll. The Newman Family were on the ground (W) of the Street Light Post. (To the (L) of the Street Light Post). In order for Wiegman to be standing next to the Newman Family and film them, he had to of moved (W) from where we see him on the above Bell still frame. This is what Wiegman was beginning to do when he stumbled and fell to the ground. He had to of gotten UP, and then continued moving (W) across the Knoll, in order to then go Down the knoll and end up standing next to the Newman Family. The Couch Film shows Wiegman moving almost STRAIGHT DOWN the Knoll. Wiegman had to of moved (W) from where we see him on this Bell still frame in order to arrive at the bottom of the Knoll and then be standing next to the Newman Family.