Have you inserted a ThumbNail camera in workspace @Quenty? Maybe thumbnail cameras will work, mostly that the player has camera movements. Otherwise, in play mode there may be a playercamera and you can configure properties.
When a player is testing in a game, there are player properties. In workspace, if you are playing there would be a “player” thing in workspace. Click the player thing then click on “Quenty”. There may be a player view insidd “Quenty” which may be a property in it. Otherwise, thumbnail cameras in workspace are misforced there. In StarterPlayer, go in the properties and “camera mode”. You can change camera mode on different occasions.