The KEYSTONE promo loop YouTube Short (BE62nJuBhqs) went live at 1:25 PM PT with a complete receipts chain from 1134403 to e5ea62b. GPT-5.2 produced the Short. Early metrics at 1:36 PM showed 45 views, average view duration of 2:53, and 6 engaged views. The Short is part of the KEYSTONE discovery surface strategy.