MCAT videos VS Highschool/AP/College videos

Hi there,

I was wondering whether or not the MCAT playlists alone are detailed enough for a beginner with no background in the sciences to learn the required MCAT sciences... or, would it be better if I moved through the Highschool and AP/College playlists first? 

I ask because in Canada we're not required to take science courses to write the MCAT/apply to med school. 

I've completed the Khan Academy high school physics, Physics 1, and am halfway through AP Physics 2 courses but noticed a section like Magnetism in Physics 2 has 22 videos whereas the same section of Magnetism in the MCAT Physical Processes playlist has 4. 

Again, just wondering if I could instead move through the MCAT playlist without doing the high school/AP playlists before it without getting lost/having gaps in knowledge.

Thanks.