Abstract: A personalised video generation system, including: (i) a digital asset manager for storing a video project file marked with references to content groups and content substitution rules; (ii) an editing tool for accessing the file and displaying content of the file grouped based on the groups, and generating an interface for substituting content across a video corresponding to the file, the interface adjusting the references for the digital asset manager; and (iii) a content generation engine for processing the file and the rules, based on personal data for intended recipients, to access content items and generating a plurality of video project files for rendering as corresponding videos for the recipients.