From the video

Video: Ranking Every Week 6 Wide Receiver as a Start or Sit
Obviously DK Metcalf can kind of pop on any given week. I'm going to throw him into the dub flex category because he's that that upside but he obviously has a low floor.
Mentioned at 35:29 – 35:34Captured by STACKED 9 hr after posting

STACKED’s take

NeutralUsage

High-upside, low-floor flex option

DK Metcalf is classified as a 'dub flex' option, possessing high weekly upside but also a notably low floor.

DK Metcalf headshotDK MetcalfWR · PITPlayer page — value, ADP, projections, and every insight