Excellent lectures and conferences online
We all know TED. But there is a lot of information and academic material freely available online. Luckily that material is growing (education and science have always been areas which, unlike what copyrights zealots might want you to think, have grown thanks to sharing knowledge).
Some examples that I have found amazing:
– Integrative Biology, UCBerkley (English)
– Videos from Nobel lectures at Gustavus Adolphus College (English)
– Lectures on current neuroscience issues by Professor Francisco Rubia (Spanish)