At ShmooCon 2012, Xeno talked about OpenSecurityTraining.info (OST1), an at-the-time newly-launched hobby project to make his own and others’ deep-technical computer security trainings freely available online. In the summer of 2021, Xeno re-launched OpenSecurityTraining2 (OST2, ost2.fyi) as a 501(c)(3) non-profit. The new site has much higher quality classes, recorded specifically for online delivery. In this talk we’ll briefly show the depth of the trainings OST2 already has freely available on topics like assembly, reverse engineering, firmware, and vulnerability hunting. And, we’ll discuss both near-future new content and decade-long plans for OST2.