I recommend exploring one of these a day for a healthy brain.
The Ragged Trousered Philosopher
Carl Sagan on Climate Change
Behind the Bastards
Kurzgesagt – In a Nutshell
Professor Dave Explains
The Warhammer 40,000 Universe
What if?
Bernie Sanders on Republicans
George Carlin on Power Concentration
Scott Galloway on Young People’s Futures
Yuri Bezmenov on Ideological Subversion
The Daily Show