Walter Lewin’s MIT lectures on Physics. Quite sad to see that they’ve been removed from MIT OpenCourseWare [1].
MIT physics 801 https://www.youtube.com/playlist?list=PLyQSN7X0ro203puVhQsmC...
MIT physics 802 https://www.youtube.com/playlist?list=PLyQSN7X0ro2314mKyUiOI...
MIT physics 803 https://www.youtube.com/playlist?list=PLyQSN7X0ro22WeXM2QCKJ...
All of you have looked at rainbows, but very few of you have ever seen one!