Shots of awe
This guy called Jason Silva is what I call "modern philosopher", he makes me think different from the massive and boring routine, he gives some inspiration about your point of view of the world and humanity and technology.
One of his vid:


VSauce
Oh this one is just awesome, he takes one random theme and explains everything about it in a smooth way, taking paralel themes and making a great lecture in simple terms.
One of his vid:


These are pretty much my favorite channels in youtube. :v