A very inspiring/interesting series of lectures by Dr.Richard Hamming.
Playlist Link :
https://www.youtube.com/playlist?list=PL2FF649D0C4407B30
The lectures are about "The Art of Doing Science and Engineering : Learning to learn" which was given to the Graduate Students at Naval Postgraduate School(NPS).
If you are doing research or planning to do or even interested in knowing about Software Engineering/Engineering in general, then this is a must watch.
It is truly a complete treasure trove of knowledge.