Update 2026_03_686c-674_transition.md

Author: kristinoletmuskat

products/dependents/transition_hub/2026_03_686c-674_transition.md

@@ -210,6 +210,7 @@ Most recently, we conducted research on a design exploration around uploading an
 
 * Last ticket: [DMT: Iterate on evidence upload experience in 686, based on research findings, adding explorations and context so next team can make decision](https://github.com/department-of-veterans-affairs/va.gov-team/issues/135372)  
 * [Related research findings](https://github.com/department-of-veterans-affairs/va.gov-team/blob/master/products/dependents/research/continuous-discovery-phase-2/Cohort%201/findings.md)
+* [Walkthrough video](https://dvagov.sharepoint.com/:v:/r/sites/vaabdvro/Shared%20Documents/Lifestage%20-%20General/Lifestage%20Transition%20-%20March,%202026/Walkthrough%20Videos/Clarify-Evidence-Overview.mp4?csf=1&web=1&e=vg9RIM)
 
 ### Phase 1 of Add flow work: Assorted child add improvements