We have prepared a video that reviews the keys prior to 23N, the day that is the axis of the plot in the fictional Spain presented in ‘Yes, they will pass.’ Spanish civil war in 24 tweets’. There are many factors that influence the trigger that causes everything to change and gives rise to the story that is told in this political and journalistic thriller. Throughout the book, researcher Juan Vega will unravel the implications of each of these keys as he interviews the characters who played a relevant role in the famous 23N.