Looks somewhat endeavourish 
What is it?
A “hacker convention” held in Germany (well, at least the Corona predecessors).
Similar to events like the “DEF CON”. At the moment it’s an online event due to the pandemic.
Live-Streams:
https://streaming.media.ccc.de/rc3/
Talks will be available here later as well:
Schedule:
https://fahrplan.events.ccc.de/rc3/2021/Fahrplan/
Most of the talks in German unfortunately, but there are some in English as well.