Provided is a screen recording preparation method for evaluating software usability using additional data of a user session carried out by a computing system includes at least the following steps in an initial phase: loading a screen recording including a number of N time-ordered screenshots of the user session from a storage medium and detecting visual features within each of the N screenshots, wherein each of the features is attributed a position within the respective screenshot and a score identifying the feature, and creating a set of metadata containing an identifier of each of the N screenshots and the features detected within each of the N screenshots and setting a threshold similarity value. The method also comprises a cycling phase for treating the metadata. Also, a computing system, a computer program and a computer-readable storage medium perform a method according to an embodiment of the present invention.