The investigators will develop and pilot test the Adolescent Stress and Substance Intervention Subsequent to Trauma (ASSIST) video intervention that builds upon ACS-COT guidelines to improve mental health care during and after hospitalization for traumatic injury. The ASSIST video intervention is a simple, cost-effective, and scalable tool that may be easily integrated into usual care settings to address posttraumatic symptoms and decrease risk of subsequent substance use following discharge.

Video intervention for participants: adolescent trauma patient-parent dyads.

Elicit feedback from content experts to further refine initial ASSIST video interventions. Conduct qualitative interviews with 15-20 parents and adolescents (12-17 years) to assess perceived usefulness of, and satisfaction with, intervention content as well as elicit feedback on areas for future refinement.

Conduct qualitative interviews with 9-12 key stakeholders in the fields of pediatric trauma care to assess clinical concerns/strategies as well as implementation barriers/facilitators.

Examine the feasibility and acceptability of the ASSIST videos, over a 3-month period, as measured by rates of enrollment and retention, interest/satisfaction, knowledge regarding mental health symptoms/substance use, incidence (quantity/frequency) of substance use, self-efficacy in having discussions about mental health symptoms/ substance use, self-efficacy around connecting participant's child to mental health and/or addiction resources, (when appropriate) engagement with a provider for mental health and/or addiction care. These will be assessed in the form of self-administered surveys and a qualitative exit interview.

Develop the ASSIST implementation protocol using a national advisory panel of pediatric trauma center leaders. Using an expert panel from the national cohort of pediatric trauma centers the investigators have worked with in a previous implementation trial, and pilot data from the investigators' institution, an implementation protocol will be developed that will be tested in a subsequent fully powered R01 hybrid implementation-efficacy trial.