The full video (via link) in the first post says it all. Circle-to-land with final heading into the fringes of a marine layer and the setting sun. Note how fast the weather turns to solid OVC during the climb-out.
SCSE (like most of Chile) has mountains to the east, which may explain why the pilot turned in fairly tightly. Also high terrain to the south, which explains a right-hand turn, putting the CA on the high side with the worst visual references.
No ILS. VOR approaches only for the reciprocal runway (due to the high terrain to the east). A slightly "tabletop" airport, so the RA callouts will be skewed and rapid in the last mile. Nearby terrain. A certain amount of pucker-factor for a 737, even without the sun and clouds.