Connect YouView box to existing set up

I am trying to connect a new YouView box to an existing set up comprising a Panasonic DMR-EX89EB DVD Recorder, a Panasonic SC-XH150EB-K Home Theatre System and finally a Panasonic TX-L32X10B TV.

I have tried a couple of configurations but either I cannot get surround sound using the YouView box or catch up TV from the apps; or I cannot record to the DVD recorder (no signal).

Grateful for any help on the right way to connect all of this!

Thanks