Continuing the journey through youtube I want to emphasize recommending the next youtube channel on my list:
TED. The abreviation stands for Technology, Entertainment, Design and this is actually a quite good description as theses are the fields which are discussed under the aspect of a vision for the future.
https://www.youtube.com/user/TEDtalksDirector
Originally TED was a anual conference but nowadays the videos broadcasted under this lable are much more known.
TED has usually high class experts giving a speech a live event which is filmed and shared on youtube.
They choose difficult topics and find extremely well working ways of presenting them to the wide public.
And even better - the founders of TED are so open minded that they allow independently organized events, so called TEDx. TEDx is also broadcasting their presentations and also provide a high standard in every aspects.
https://www.youtube.com/user/TEDxTalks
I highly recommend these channels to my students - will you?