Chapter 1 You may not have the time to download or watch, but I'll leave it here anyway.
Lecture Series on Artificial Intelligence by Prof. P. Dasgupta, Department of Computer Science & Engineering, I.I.T,kharagpur. For More details on NPTEL visit http://nptel.iitm.ac.in
I watch on VLC at 1.3x playback. The lectures are about 59min long. Just watch the lectures pertaining to concepts you having issues with.