Ionic - embedded video no sound in iPhone 6

Ionic Version - 2
I embedded a youtube video in a page and build an android & iOS app. When I open the app in Android and play the video, it is working fine but, if I open the same in an iPhone 6s, the video plays with No Sound, but If I open the same app in a iPhone 7 the video plays perfectly with sound. Can anyone help me with this issue? Should I set some specific permissions for iOS?

Could it be related to this?

Notice that I linked to a comment directly. Check the side switch on both devices, if they’re set to mute :slight_smile: