Can't hear when connect to bluetooh headphone Swift 3

Alyn

Hiii i recently bought a Acer Swift 3 laptop. But it have problem with the bluetooh headphones, when i play youtube video, i can't hear on my headphone. i can hear at this laptop only. but when i plug the headset, the realtek audio console will show and i change to speaker out and i can hear the sound through headset. but when i connect the bluetooh headphone, the realtek audio console don't show up and i hear the video through laptop only. not on heaphone. but when i test the audio on setting, i cant hear it clearly on my headphone. Is there a setting that i can make to make it change automatically when connect? 

Thread was edited to add model name to the title

Leostat

On the start bar, does it let you select the headphones as the output device? In sound settings you should be able to set it as the default device, and then it will swap over when available if the headset supports it