This clinical trial studies whether educational tools work to improve early advance care planning (ACP) in adolescents and young adults (AYAs) with solid tumors that may have spread from where they first started to nearby tissue, lymph nodes, or distant parts of the body (advanced) and high-grade brain tumors. The incidence of AYA cancers is on the rise with approximately 90,000 new diagnoses yearly in the United States. Cancer remains the leading cause of disease-related death among AYAs, which could be due to patients having more advanced disease at presentation. It is recommended that AYAs begin ACP conversations at the start of treatment. ACP includes clarifying goals of care, discussions about end-of-life preferences, and completing a legal document that states the treatment or care a person wishes to receive or not receive if they become unable to make medical decisions (advance directive). The educational tools in this study include an early ACP educational video featuring AYAs with cancer and an ACP appointment geared for AYAs. Patients can access and watch the educational video at home prior to their scheduled ACP appointment. During the ACP appointment, a tailored ACP guide made specifically for AYAs is reviewed and questions regarding ACP are answered. This may help to introduce the importance of key ACP concepts, which may improve early ACP in AYAs with advanced solid tumors and high-grade brain tumors.