From the video

Kaylon Black 31% owned. Which is crazy... I mean he's the premium handcuff. He's playing a lot again... You had Shanahan saying he wants to take more work off CMC's plate. Uh saw eight carries season high and then 12 carries season high uh his last two games. Uh CMC picked up a mild hamstring strain in week seven.
Mentioned at 17:32 – 21:12Captured by STACKED 8 hr after posting
STACKED’s take
Positive signalValue
Premium handcuff at 31% owned; could jump to A/B tier if CMC injury worsens.
Premium handcuff at 31% ownership, playing a lot again. While handcuffs are generally a dime a dozen, Kalon Black stands out with potential stand-alone value trending beyond pure handcuff status. Christian McCaffrey has 60 touches on the season with recent workload increases (8 carries season high, then 12 carries season high in last two games), and Shanahan has stated he wants to take more work off CMC's plate. CMC suffered a mild hamstring strain in Week 7 with optimistic early reports, though the 49ers' injury history warrants caution. Kalon Black rated D tier currently but could easily move to B or A tier if negative CMC injury news emerges.
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