Strange brightness/color flickering with 4K videos

[Landey]

Switch to fullscreen and 4K (even if you use a HD display), look at the lower left area of the video - there's quite some strange effects, like darker/different colored patches dancing around. Subtle, but visible.
I noticed that effect with HD 4K videos showing more or less plain green surfaces, with other subjects the effect does not occur (or becomes invisible).
My other HD 4K videos, taken some days before, also show that "flickering".

Did you also notice that problem with your Nano?

By the way: I like that "stars" sparkling in the water - this is no added video effect, it's just out of camera.

 

[Ezzelin]

Were you in HDR mode? I've seen that in some of my videos taken in that mode. I think it's trying to boost the shadows and revealing some sensor noise.

 

[Landey]

Yes, it's HDR mode.
I'll check if the issues is also present in non-HDR videos.
Thank you very much for pointing me to this possible reason!

Update: Just checked with a Log recording - issue does not occur. Seems like you were perfectly right!
Update 2: Just also spotted the "light version" of that issue with Log recordings. Grmpf,

 

[Whyrless]

Were you in HDR mode? I've seen that in some of my videos taken in that mode. I think it's trying to boost the shadows and revealing some sensor noise.

How do you turn off HDR mode on the Autel EVO II?