Why can't get sound on Facebook when using my iPhone 6 on wifi?

[iMore Question]

why can i not get sound on facebook when using my iphone 6 on wi-fi?

when i am on wi-fi, using my i phone 6, i can not get sound on you tube videos.

 

[Alen Simonic]

Re: why can i not get sound on facebook when using my iphone 6 on wi-fi?

Is it like that from the begining or just recently