I am going to work through every problem in the College Board "Official SAT Study Guide." You should take the practice tests on your own, grade them and then use these videos to understand the problems you didn't get or review. Have fun!
Problems 1-3 starting on page 395 of College Board Official SAT Study Guide.
A little more on problem 17 and problem 18 on page 412.
Problems 10-14 starting on page 474 (but I get the wrong answer for 14 because of a sal malfunction).
A redo of problem 14 on page 475 because I can't do arithmetic.
Problems 14-17 and part of 18 starting on page 534.