add video and social post

README.md

@@ -73,11 +73,11 @@ acquisition.
 
 ## 🎥 Demo video
 
-> _Placeholder — demo video coming before the June 15 2026 deadline._
+https://youtu.be/3R139SneUzA?si=zGK5RLvHhFSDOs44
 
 ## 📣 Social post
 
-> _Placeholder — link to the social-media post coming soon._
+https://www.reddit.com/r/aigamedev/comments/1u55h2u/webbased_ai_doodle_game/
 
 ## Run it locally