Self-studying APs oh no

Guys, I am self-studying three easy AP's (apparently) which are environmental science, psychology, and human geography. I bought Barron's books but they are simply too wordy and I can't bother to review from them. Can I watch full exam reviews on youtube as well as other youtube videos and study from online exam review outlines and get 5s? I am a very hard worker and have pretty much A+'s in all my classes but I'm stressed for them.