Add background image and audio to playlist, or Layouts in layouts

I think if the playlists had an option for setting background audio and a background image or color it would make the loading of new layouts less transparent. Currently if I have the same live stream audio on 2 layouts in a playlist, it still "reloads" the stream when it switches, creating gaps. If it was on the playlist itself, it wouldnt need to reload. Alternatively, Layouts in Layouts would allow you to make "background layouts" with content that loads and changes in it. Personally, I'd rather have this but that feels like it would be harder to implement. Thanks!