As of today, I haven't attended to any major conference as a speaker (but I keep submitting papers). Even though I had given several public sessions, they are not any recordings publicly available.
This is a list of my main contributions as a speaker/mentor:
Bitnami Bootcamps [Three times, Spanish]
Speaker and mentor at Docker and Kubernetes sessions. Assistant in the other sessions.
µControllers Workshops at university [Three times, Spanish]
Coordinated and mentored an introducutory workshop to microcontrollers using the development kit Launchpad MSP430 from Texas Instruments. We got Texas Instruments to sponsor the events.
Eurathlon/ARCAS Summer School [English]
One of the mentors of the event. Teaching, helping and guiding people that participated in this Summer School from all over the world. Was an amazing experience.