Chiming in a little late here but better late than never. Personally I've noticed that under advanced wifi settings of the cx ipV6 was enabled by default, but my router didn't have it on. So i configured the router for ipV6. Now i am getting 100mbit/s running speedtest in the TVs webbrowser as opposed to 8-10 mbit/s.
Windows PC: Press shift + alt + left click. macOS: Press shift + option + click. Game console: Press up > up > down > down > left > right > left > right > up > up > up on the controller or remote. Once you have brought up the hidden buffering rate menu, adjust the buffering rate and attempt to watch your video.
Download speed on LG C1 is 50-55Mbps regularly and no higher. That's 24Mbps (2MB) lost. A 1/4 of the speed. The router is 5 feet away from the TV. Here's the thing. I plug in a 4 year old HDMI firestick and use the silk browser and I get max speed (79MMbps) in the firestick HDMI input. This explains one thing. NDCU. 246 494 403 35 388 461 411 343 168