Question about Blu Ray movie audio level

[GSHARQ]

When I watch a Blu Ray movie on my PS4, the audio is significantly lower when compared to the audio of a game being played on the same PS4.

To give you an idea, a game at a volume setting of 15 on my TV is the same as a Blu Ray movie at a volume level of 40-60 on the same TV (varies depending on the movie). In other words, my TV's volume level has to be set at about 3 to 4 times as much for me to listen to it at a comfortable level.

The same can be said when comparing the audio level of a TV show compared to the audio level of a blu ray movie - I can watch a TV show (on my cable box) with my TV's volume level at 15.

I'm sure there is a technical reason for this, but I'll be damned if I know what it is. Can someone please explain it to me? Are blu ray movies designed to be quieter than other audio formats for any reason?