You can memorize all the reactions and reagents. However, if you do not start solving problems, that would not increase your score. What you are doing is a good start, but not enough.
gorge, you need to go to coursesaver.com. The link is on the left hand side. You can either order the videos or the quizzes separately I believe (not 100%, I ordered the vids which come with quizzes). Both require subscription