Aileen Ellis is an American PMP instructor whom I greatly respect. I discovered her videos after reading one of her short books on scheduling.
She has a series of free Youtube videos reviewing more obscure aspects of the PMP Exam with the benefit that they are usually recorded from live or online webinars with her students.
She takes pains to explain the question, the salient words that might suggest the right response from the multiple choice answers and any ambiguities that might confuse her students.
This example is fairly minor, but it does demonstrate her thorough and helpful approach to PMP exam preparation.
I hope you enjoy her video and find some value in her other videos.