If ur playing a music video with AC3 sound in a game and you’ve got a Dolby Surround 5.1 setup, you should be able to hear the back channels from behind and the front channels in front. That’s how 5.1 surround sound works, giving you that immersive experience.
Also, if you’re into Dolby tech, check this out: https://hifiaudios.com/home-theater/dolby-digital-vs-dolby-atmos/.