Background: Patients receiving novel treatments like immune checkpoint inhibitor therapy (ICI or immunotherapy) to treat their cancer require comprehensive information so they know what to expect and to encourage the identification and reporting of possible side-effects. Videos using patient stories can be reassuring and an effective method for conveying health information. Objective: The objective of this study was to use a co-design process to develop video resources about immunotherapy to identify a) the key informational and supportive care needs of patients and family carers and b) topics clinicians recommended be addressed during pre-treatment nurse-led education. Patient involvement: Experience Based Co-design (EBCD) provided the framework for video development, to facilitate patient and carer involvement in every stage of research design and implementation, and video design and development. Methods: Data were collected and used in four stages: 1) qualitative interviews, 2) co-design workshop, 3) filming plan and 4) feedback and editing. Results: Thirty-five individuals contributed to the development of a suite of five videos called “Immunotherapy: What to Expect”. Videos covered general treatment information, preparation for infusion, potential side-effects, balancing lifestyle with treatment and seeking support. Video run time ranges from 6 to 15 min. Discussion: The EBCD process ensured that videos were developed to meet patient and carer identified needs associated with commencing and managing ICI therapy. The structure of EBCD in facilitating patient and carer involvement throughout the research and video development process ensured transparency throughout the project, and continuity of message, scope and outcomes. Practical Value: EBCD is a useful framework for developing patient-centred health resources. The videos developed are now available for patients and carers via YouTube, and provide education and support tailored to this groups’ needs regarding ICI therapy for cancer.