What the source shows
DeepMind presents world generation as an ongoing interaction rather than a fixed video clip. The examples include changing conditions while a user moves through a generated environment.
Supporting documentation (opens in a new tab)What to take into your own work
For an interactive demo, examine continuity: revisit a place, change direction and return after an event. A beautiful frame says little about whether the world preserves useful state.
What this does not establish
The research announcement describes consistency over a limited duration. This is not evidence of a ready-to-ship game engine, exportable game assets or unrestricted consumer availability.