Are the Commission's explanatory notes to subheading 8525 80 30 and to subheadings 8525 80 91 and 8525 80 99 of the Combined Nomenclature to be interpreted as meaning that there are also ‘at least 30 minutes in a single sequence of video' in the case where, by means of a ‘video record' mode, sequences of video together lasting longer than 30 minutes are recorded, but those sequences of video are recorded in separate files, each with a duration of less than 30 minutes, and the user must, when playing back, open each file with a duration of less than 30 minutes separately, although it is possible, with the aid of the software supplied by GoPro, to place the sequences, which have been incorporated into those files, on a personal computer one after another and thereby save a single video sequence of more than 30 minutes' duration in a single file on a personal computer?