HDR video playback in a dark environment - Samsung Galaxy S9 Questions & Answers

I have a Galaxy S9 Duos (Exynos) and I have an issue when viewing an HDR clip (ex YouTube) on a very dark environment - like at night, in a room with no lights.
When playing the video, the screen keeps changing brightness depending on the light coming from the clip. I suspect the brightness sensor reads some of the brightness from the screen and, as the images change in brightness, the screen brightness changes too. It happens only with HDR videos and I have no issues if I watch the video in normal or dim light, only in complete darkness.
I am wondering if any of you have experienced this?

I have the same in certain scenarios on my Exynos model.

i have the same issue - but i dont think is to do with the light in the room but with youtube app
i aslo have HDR on netflix and Amazon - and i can confirm both work OK
on you tube however it changes - flickers id say - based on whatever is displayed on the video -
so am guessing is a youtube issue

It's good to hear that I'm not the only one having this issue (so my phone is not defective) and it's even better to find that it's only on YouTube (I don't have any other HDR streaming services to test it with). That means it will probably be fixed pretty soon.
Sent from my SM-G960F using Tapatalk

Hi,
I have a similar issue with the YouTube app on the S9+ exynos version (UK) but after the March update it didn't happen again for the same video. Although, when I compared YouTube playback with the S8. It didn't seem that HDR was enabled for the same video.
Also the native video player is also not playing back HDR video with it enabled although 'HDR' is bold in the title, identifying that it is a HDR clip. The same clip plays on the S8 with HDR enabled. I wonder why it's inactivated out of the box.
I contacted Samsung on Friday 9th March and they took my serial number and IMEI. They said they'd get back to me this week.

I'm getting this with the S9+ Snapdragon version. Doesn't seem to happen every time though. I killed the youtube app and when I watched the same HDR video again it didn't happen this time while HDR was definitely on.

Doesn't do it when watching in normal light conditions but constantly does in low light .

Same issue here...

S9 plus-US
I also have the same problem in YouTube I'm using s9 plus snapdragon version US , I usually keep the brightness about like 10 to 20% and when I enter into a HDR video and tilt my screen the brightness just goes up drastically and sometimes flickers.

The fix is placing it in cinema mode and turning off adaptive display mode whenever you watch hdr on YouTube on the s9 or s9 plus. Adaptive mode changes the brightness especially in low light when watching hdr. Also keep video enhancer on........

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