Good news : for AUVIO, a webOS application is now available. 🙂
For RTLplay, there is an app, but it only provides podcast and live, no access to series or movies, contrary to the www.rtlplay.be web site.
Unfortunately, the latter does not display contents on the webOS internet brower (too old), as you reported.
Indeed a big problem with WebOS and LG televisions: the web browser is not up to speed.
Concerning Auvio, the Belgian TV company has now developped a WebOs application and this one works fine on LG televisions.
For RTLPlay, there is a WebOS application, but it offers a very limited contents with respect to the www.rtlplay.be web site.
Unfortunately, the contents of the latter cannot be viewed due to "incompatible web browser" :-(
After turning on the LG SL6Y Soundbar exactly 30 minutes later, the sound becomes very quiet. Tried all connection types. After everything works for 30 minutes and fades. Dropped settings. Nothing helps. Now on an optical cable. HDMI 2.1 did not help either, the same thing via Bluetooth.
One of the masters on the forum says that because of the firmware.
Lg nanocell 866NA Sound: LG SL6Y