Playing a music while recording a video

[Windows Central Question]

While the music is playing with my phone (Lumia 730) and I try to record a video with my Camera the music pauses itself until I stop recording!!!!
I've tested this with Lumia 950 & 650 and in both phones the music keeps playing during the video recording and will be recorded in that video
Is this because of my phone model or there is setting for that????
I've the latest official windows 10 mobile version installed on my phone