From the video

He is on the ball 79% of his snaps. He is only in the slot on 11%. So true X receiver only alignment... He has run a go route on 28% of his routes. So very much pure sacrificial X receiver stuff, which I do not think fits Marvin Harrison's skill set in any way.
STACKED’s take
Cautious buy for Harrison Jr. as he transitions to a Z receiver role in Houston
Matt Harmon notes that Marvin Harrison Jr. has been a disappointing player relative to expectations, citing a 38.5% catch rate through four games in his third season. Harrison was relegated to a 'pure sacrificial X receiver' role, lining up on the ball for 79% of snaps and running a go route on 28% of his routes, which Harmon argues does not fit his skill set. Success rates were poor (59% vs man, 69% vs zone, 46% vs press), and he suffered from a 46% on-target rate. Despite these struggles, Harmon views him as a good starting receiver who can be a useful contributor for the Houston Texans, projecting a transition to a Z receiver role to replace Jayden Higgins. Harmon recommends a 'cautious buy' for redraft and dynasty, noting he should be rostered everywhere.
Marvin Harrison Jr.WR · HOUPlayer page — value, ADP, projections, and every insight