Since 1995, the Organization for Human Brain Mapping (OHBM) Annual Meeting has provided a critical platform for sharing the latest developments in brain mapping. OHBM has recorded presentations for over a decade and made them accessible to its members through the OnDemand platform. As of 2024, this content is now openly and freely accessible to brain mapping enthusiasts worldwide—without the need to be a society member. Limited access to cutting-edge scientific content solely to paying members contradicts the longstanding ethos of OHBM, which has championed open science principles and practices for many years. In this paper, we introduce the OHBM Time Machine, a collaborative initiative undertaken by the Program, Education and Communications Committees of OHBM. The project seeks to create a free and permanent archive of all recorded Annual Meeting content, accessible to members and non-members alike. We outline the ongoing efforts to migrate all content dating back to 2015 to the OHBM YouTube channel and provide guidelines to support hosting future Annual Meeting recordings. Additionally, we discuss the benefits and challenges associated with this initiative, explaining why making this content publicly available will not diminish the value of attending the Annual Meetings. Instead, it is expected to enhance interest and awareness of OHBM as a world-leading organization of brain mapping experts. The OHBM Time Machine will provide an unparalleled educational resource, establishing a lasting record of scientific progress and the evolution of critical topics within the field of brain mapping.