Consistency is the key to a scalable preservation workflow, and so if a publisher or platform supports multimedia content or other enhanced features, establish basic rules early on and continue to express these features in a consistent way. Limit formats and arrangements as much as possible. For example, if one embedded video is an MP4 with no caption, another is a WEBM and has a caption in a box, and another still is a Vimeo video with a caption but no box, for some approaches these minor inconsistencies can cause problems when performing preservation activities at scale. These potential variations should be clearly defined and constrained.
These other guidelines may be helpful when implementing new features:
3. Use existing standards when implementing features
6. Keep preservation partners informed of changes that affect the publications