OXM reports that, in response to a redditor's complaint to the UK's Advertising Standards Authority about the visible differences between the playable and trailer-demonstrated versions of Aliens: Colonial Marines, Sega Europe has agreed to put disclaimers stating that the game shown is the demo version next to their videos.

Update: Some, but not all, of Sega Europe's YouTube videos now feature the disclaimer, "The trailer footage shown uses the in-game engine, and represents a work in progress." We're asking Sega Europe for confirmation.

Update: Sega has chosen not to comment.