Near the beginning of this footage, the camera pans across to briefly capture the front steps of the TSBD building.
Around 2017 Tom Graves and Sandy Larsen identified Gloria Calvery and a colleague (most likely Karan Hicks), at the steps.
Gloria is wearing a black headscarf, has her back to the camera and appears to be interacting with a bald man, stood higher upon the steps and facing her.
This man is Billy Lovelady.

The image above is taken 25 - 30 seconds after the headshot.
In his affidavit, taken a couple of hours after the shooting, Lovelady states he was on the front steps at the time of the shooting and that "after it was over we went back into the building."
No mention of him moving from the steps.
In his WC testimony he states he was on the steps when Gloria came running up and told him that the President had been shot. This is the moment we are witnessing in the image above.
A close examination of the GIF below (created by Chris Davidson, watch full screen and quarter speed), we see Karan Hicks (the woman in white) arriving at the steps and starting to climb them. She appears to have her arm linked with Gloria. As she climbs the steps, she seems to be briefly halted by the stationary figure of Gloria as she tells Lovelady, and others on the steps, about the shooting. Bill Shelley, returning from the concrete spur dividing the Elm Streets, has his back to the camera as he takes a couple of large strides towards the steps before turning to his left and we see him in profile -
“I ran across the street to the corner of the park and ran into a girl crying and she said the President had been shot. The girl’s name is Gloria Calvery who is an employee of this same building. I went back to the building...” [Shelley - affidavit 22nd Nov]
https://drive.google.com/file/d/1vobiYYwTLsuR63NZ0vX9ytxXNjlW4g8D/view?pli=1The important aspect of Darnell is that it shows Lovelady on the steps, interacting with Gloria, as Baker arrives at the front steps.
This reveals that both Lovelady and Shelley lied about their movements in the immediate aftermath of the shooting.
They were truthful in the very first statements they gave, but were quickly making up ever-changing stories until the version they settled on for the Warren Commission Sham.
After the shooting, Shelley ran across to the concrete spur dividing the Elm Streets where he met Gloria coming the other way. Gloria was crying and told him the President had been shot. As they were making their way to the TSBD building Gloria approached Officer Joe Marshall Smith and told him that someone was shooting at the President from the bushes - "she was in hysterics" Smith recalls.
At the steps Gloria told Lovelady and the others about the shooting. Immediately after this Shelley and Lovelady entered the building through the front door and made their way to the back of the first floor where they were seen by Vicki Adams as she raced outside. They were the two white men that Baker saw in this area as he and Truly were making their way to the elevators.