From the video

Corey Davis who look, very similar to QJ. I think was a disappointing disappointing first-round pick, but turned into like a solid starting receiver... Corey Davis that year, him and A.J. Brown were both top five in the NFL in yards per route run that season... Corey Davis I think had like 10.7 yards per target that year. Corey Davis I think had like 10.7 yards per target that year. He made a lot of efficient plays on lower volume for the Titans that year because the Titans were 31st in 11 personnel rate with 39.3% in 2020.
STACKED’s take
Davis's 2020 efficiency (10.7 YPT, top-5 YPRR) offers a comp for Johnston's upside.
Corey Davis in 2020 with the Titans was a disappointing first-round pick but turned into a solid starting receiver, posting 10.7 yards per target and ranking top five in the NFL in yards per route run (behind only A.J. Brown). Matt Harmon uses Davis as a comparable outcome for Quentin Johnston's potential trajectory. Matt Harmon cites 2020 Corey Davis as a comparable archetype for Quentin Johnston's potential season outcome. Davis posted 10.7 yards per target that year while making efficient plays on lower volume for the Titans, who ran 31st in 11 personnel rate at 39.3% in 2020—a similar offensive structure Harmon expects from the new Chargers team with fullback and tight end usage.
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