May I know whether you will be streaming from the in-built apps of your LG TV or you are planning to watch the downloaded content from hard disk/pendrive through USB ?
If its streaming through in-built apps then none of the streaming services provides DTS-HD or Dolby True HD which might require higher bandwidth. So for streaming, even the HDMI 2.0 cable will suffice for eARC to work.
If its streaming through in-built apps then none of the streaming services provides DTS-HD or Dolby True HD which might require higher bandwidth. So for streaming, even the HDMI 2.0 cable will suffice for eARC to work.