To support the work of clinical medical physicists, the IAEA is committed to developing and disseminating best practices to ensure that procedures under the responsibility of medical physicists, such as quality control and acceptance, are performed with the utmost safety and quality, for the ultimate benefit of patients.?For this reason, the IAEA developed a video tutorial demonstrating and explaining the procedure of accepting a new source in high-dose rate (HDR) brachytherapy.