I'm a Harvard Grad, SAT/ACT perfect scorer, and professional SAT test-prep tutor since 2002. Below are my top 11 personal recommendations for SAT prep practice tests, strategy and learning books, online learning programs, videos, and the like:
Unless otherwise noted above, the materials are paid materials. In some cases (SAT Quantum, for example), there are free videos as well as paid videos.
I have ranked the videos lower than the books because I prefer learning from books and adaptive online learning programs to static videos. In general, I would caution against a video-heavy learning approach, which is tempting due to its ease/convenience, but often leads to low retention as a result of passive learning.