audio

So I can connect my iPhone XR to the Uconnect and I can play Spotify, and google maps and my phone calls. But when I play a video on FB, or YouTube, or Snapchat, there is no audio, I just bought this truck 3 days ago and can’t seem to find any help

I recently bought this subwoofer box online. I'm skeptical about buying stuff like this online because what if I don't like it, but man let me tell you it was the best investment I made to my crappy 6 speaker setup. I got a ported box for 2 10 inch woofers and I decided to go with some jl audio...