The coursesaver videos are videos of a study session designed for preprofessional tests (MCAT, OAT, DAT...). His free ones maybe are too, but he seems to have designed the material to help students more so do better in general chemistry classes. I feel, I could be wrong, that he gives a few more hints on how to approach the material from a testing standpoint. That being said I think if you understand the material that he gives in the videos you will get just as much out of his free site, provided you use his other free site as well and do practice problems, as the coursesaver site.
That is like too I think his organic chemistry videos on his free site are more designed to help students in an ochem course and for the ACS exam and than for the preprofessional exams. Again if you understand that material though it shouldn't matter.