They just swing back & forth on the support rods. Real basic. From your video, looks like it's working fine. I work on a lot of these. Common things I run into is clothing in outer tub (usually causes F-51 error or just covers up the pump inlet), coins in the drain pump, worn suspension rod bushings ( makes a "crunchy" sound as the mechanism moves) there's a kit with all 4 rods & balls/bushings. And my favorite: the bad bearings. I'm getting good at installing the bearing/shaft/seal kit. Only 45 - 50 minutes now.