Special Viewer Emergency Request: 2x2x4 Tutorial

Here is a special emergency request! A viewer was in need of further insights regarding the solve of a 2x2x4, so here it goes! I'm going to take this opportunity to get into more detail on how to solve the puzzle by starting off with a 2x2x2, moving up to a 2x2x3, and ultimately tackling the 2x2x4. This is an example of a corners only puzzle, so there are really just two algorithms. This tutorial assumes no knowledge on how to solve any puzzle of any kind, but you do have to know the notation! Top to bottom corner switch: 2R U 2R Ui 2R Adjacent corner swap: 2R U 2R Ui 2R Ui D 2R Ui 2R U 2R Middle parity fix for odd layered puzzles: 2U 2R 2F 2U 2F 2R 2U 2F Middle parity fix for even layered puzzles: 2U 2R 2F 2U 2u 2F 2R 2U 2F Let me know if this clarifies things, and if you'd like me to do something similar with the next step up, those with edges, the 3x3x3, 3x3x4 and the 3x3x5. More special viewer emergency requests will be done depending on timing and the immediate availability of the requested puzzle!