We are entering a Grand Solar Minimum. Sun radiates less heat. Sun blocks fewer cosmic rays (nuclear particles) due to a reduced solar magnetosphere allowing more particles to strike the earth causing more volcanoes and earthquakes.
Earth's magnetosphere is also reduced allowing Jet Stream to wander causing floods like in the Midwest and droughts in other regions. Both reduce crop production.
I'll go back to the presentation: I ignorantly thought it was talking about something else altogether. (And I generally like reading information much more than watching it.)