So I can't tell you exactly what menu to look at. But you need to tell a little more. Such as the full link to the product and manual as well as how it's hooked up now.
What I look for are audio options in the YouTube app. Set that to stereo or speakers since an analog output rarely is beyond stereo.
Hi, I bought a Sanyo LCD TV and run audio through my surround sound system. SS is older and has no optical or HDMI inputs. When I watch tv I can hear the audio through my SS ok, but if I switch over to youtube, no audio. I've tried different things like getting an analog to digital converter, a digital to analog converter and no sound. It looks like the only option is a sound bar or a new surround sound system unless someone knows of a good solution?