I assume the un-named male First Officer was the Pilot Flying during the descent and initial approach, while Captain Tammie Jo Shults ran the checklist and the radio. (except when the FO responded to ATC clearing SWA1380 direct to Philadelphia)
On final, when they switched to the tower frequency, Captain Shults took over flying while the First Officer worked the radio.
(after landing the Captain went on the radio again)
EDIT: This one is better than the one I originally linked to: