You can use these in any way you find useful, but attempting to solve the problems is much more likely to help you than passively watching the review and solutions.
The video review is split into three parts. The first part covers vectors and scalars and explains how to add, subtract, and scale vectors in two and three dimensions. The second part covers the dot product in two and three dimensions, along with some basic applications. The third part covers the cross product in three dimensions. The practice problems are not split into parts, since part of the challenge of solving some of them is deciding what methods to use.