Add possibility to play video in the background as an audio

[Mathis-Aubry]

Checklist

• [x] I made sure that there are no existing issues - open or closed - to which I could contribute my information.
• [x] I made sure that there are no existing discussions - open or closed - to which I could contribute my information.
• [x] I have read the FAQs inside the app (Menu -> About -> FAQs) and my problem isn't listed.
• [x] I have taken the time to fill in all the required details. I understand that the request will be dismissed otherwise.
• [x] This issue contains only one feature request.
• [x] I have read and understood the contribution guidelines.

Feature description

I would like to suggest adding the possibility to play video in the background, as audio only

Why do you want this feature?

Right now I have vlc installed only for this feature, this feels wrong...

Additional information

What do you guys think about it ? Put some attention here, tell us if you'd be interested !

[michaelWuensch]

+1 this would be awesome.