Here is a video of His Holiness the Dalai Lama’s talk in 1996 on the Four Noble Truths. This is a long video, more than an hour, and it’s only the first part. So set up some time for yourself and enjoy His Holiness’ teaching.
The Four Noble Truths is the essence of Buddhism. It’s the first thing the Buddha taught to his future students after having attained Enlightenment.
Each video is about one hour and a half long. So be prepared.