LG G3 Adjusting Brightness on its own even with auto brightness checked off

[joe watson1]

Thanks a lot for this information. I almost returned the device today and went back to my good ol' nexus 5 but after i read your comment it fix everything for me.

What fix?

 

[eljeffe58]

Any resolution to this problem? How annoying.

 

[EuphoricFuzion]

Why don't you try reading the above posts.
DG1279 Nailed it! And thank him.

 

[meauoc]

Found the answer on another site: The video has a separate brightness to the rest of the phone. While viewing a video, drag your finger up the left side of the screen. You should see a slider to increase brightness.