The game itself enables you to skip intro video by pressing "E". To always skip them, follow these instructions:
\Program Files\Epic Games\MetroExodus\MetroExodus.exe
The list below shows the directories where the game stores its configuration files. On Windows, the file that configures the settings is user.cfg. There is another configuration file in the same directory, profile.cfg, with unknown purpose, possibly related to the Epic Games user profile.
 On Windows (Windows 10 Pro 1909 at least), with Dolby Atmos (Version 3.20402.409 of 2019-04-26 at least) in its default "Music" mode, directional audio may not work as expected. Speaker's voices fade in and out seemingly at random, making it next to impossible to follow dialogue. It sounds as if Artyom has a hearing problem. One solution is to switch Atmos to "Games" mode (translated from "Spiele" in German).
Since at least 2020-01-17, the game's user interface has separate volume controls under Options -> Audio.
(might work only if the game is installed inside program files directory structure)