Being a newbie in ML, I found intro video quite helpful, having difficulty to grasp the idea of training, why is it needed etc, I found Mostafa's explanations quite helpful. I have taken ML's by Ng as well and due to heavy use of stats I could not grasp it.

Now I am learning Stats by Prof.Thrun at Udacity I assume I will be able to grasp it in much better way.

p.s: anyone is trying to learn ML basics and wish to learn? Why not learn together and solve the interesting problems together? contact me via email given in profile