OpenAI has introduced new features to its Sora app, including 'character cameos' and video stitching. The additions enable users to turn nearly anything into a reusable avatar for AI-generated videos and combine video clips to create longer multi-scene films.
Reusable AI characters in Sora
https://www.theverge.com/news/809877/openai-sora-app-character-cameo-updates