Question about Conceptronic Adapter Bluetooth Bluetooth Adapter 5.1 NanoUSB 10-20m black

I don't think the TV recognises the USB dongle, I would use an aux to bluetooth adapter, e.g.:
4smarts B9 (transmitter)
Then the TV will think it has headphones connected, that will definitely work.
The quality should not be affected, I have no idea about the delay but there is a setting on most TV's where you can compensate for the delay.