Depends what they call "in-game". I doubt those are "in-game" camera angles and movements. Since they should already have the map design tools, for all we know they could have decided to create a very detailed setup for the trailer, capturing each rendered frame and assembling them into a real-time reel.Starfield E3 2021 trailer was entirely in-game -
It's still just a trailer, not gameplay footage. Remember how the AI was going to blow us away in Skyrim? With "in-game" gameplay showcasing NPC AI at work?
Sorry but until I see actual gameplay reviewed by other people after release, it's only marketing to me. Which means very low credibility. At best, it's the setting and the atmosphere they want to convey around the game.