Hello Roshraj
Yes. The video lessons of The PM PrepCast training course have been reviewed to ensure that they cover the tasks and enablers of the current exam content outline.
You are of course absolutely correct when you say that we follow the PMBOK Guide. But that is just the structure/order/sequence that we decided to follow, because the PMBOK Guide is such an important reference book for the exam. But go ahead and take a look at Module 20, 21, 22 and 30, where we shift away from the PMBOK Guide and cover other topics.
So rest assured... the lessons are valid.
My recommendation: Go ahead and start taking quizzes in the exam simulator by Knowledge Area. So each time you are done with a module in the PrepCast/PMBOK you can fire up the simulator and take a 50 question exam on whatever knowledge area you just finished.
If you don't know how to do that... watch this tutorial here first
traffic.libsyn.com/pmpodcast/pm_exam_sim...or_learning_quiz.mp4