A new multimedia file that includes multiple video frames is received. A determination is made as to whether a set of one or more machine-learning models was previously applied to a related multimedia file to identify at least one unique item of interest in the related multimedia file. In response to the set of one or more machine-learning models being previously applied to the related multimedia file, the set of one or more machine-learning models may be applied to the multiple video frames of the new multimedia file to at least identify the at least one unique item of interest in the new multimedia file. In response to no machine-learning model being previously applied to the related multimedia file, a new set of one or more machine-learning models may be applied to the new multimedia file to identify one or more unique items of interest in the new multimedia file.