If you want to see how Grand Theft Auto V looks on Xbox One, YouTube user ThaGamesFactory uploaded a rather interesting clip.

The video showcases quite a bit of gameplay in various locations, showing great vistas, lovely foliage, the ocean, urban environments, first person action and quite a lot more. It even shows a barrel roll with inevitable achievement.

Even if the quality is quite decent, it's presumably recorded from a livestream, so keep in mind that quality will suffer a bit.