I am a co-admin of the Azure Meetup Stockholm group. We usually host sessions on anything Azure related at an office and usually in the evening. Due to the current situation, corona, we decided to move the sessions to YouTube. I did my first session this Monday (1st of June 2020).
The session is on how you can achieve full redundancy between different Azure data centers in the event of an outage, the challenges this poses and a proposed solution. It also contains a fair bit on more hard core computer science, trying to explain why it is impossible to reach 100%.