33:01 after watching the 3blue1brown serie and being on this video on this serie I'm a huge fan of columns, and find they make much more sense than rows.If you want to understand the geometrical meaning of linear algebra I recommend everyone to watch the 3blue1brown playlist, everything you use on linear algebra has a geometrical equivalent, why matrices that have determinant equal to 0 doesn't have an inverse, how linear transformations (matrices) modify space, how the basis vectors generates the space, how the determinant of a linear transformation is the factor by which the area of something in that space changes, and so forth.####[]