Black screen trying to play HDR videos on YouTube.

https://support.google.com/youtube/answer/7126552?hl=en

On the link you can find the description how it should work.

"

Upload High Dynamic Range (HDR) videos

You can upload High Dynamic Range (HDR) video content to YouTube. HDR videos show higher contrast and more colors than standard digital video.

Viewers can watch HDR videos on compatible mobile devices and HDR TVs. They can also stream HDR videos using Chromecast Ultra to an HDR TV. Viewers can confirm HDR playback when a video is played if they see an "HDR" badge on the playback controls or in
the quality menu.

Viewers watching on non-HDR devices will see the video as a standard dynamic range (SDR) video.

Upload HDR videos
HDR videos must have HDR metadata in the codec or container to be played back properly on YouTube. The most reliable way to properly record the metadata is to https://support.google.com/youtube/answer/7126552?hl=en#davinci_resolve.

If you use a workflow for color grading that doesn't export standard HDR metadata, then you can use the https://github.com/youtubehdr/hdr_metadata to add HDR metadata to a video. This
tool will only work correctly if your video was graded using an HDR transfer function.

Note: If you aren't sure if your video was graded using an HDR transfer function, using this tool will badly distort your videos. Many things that have "HDR" in the title were not graded with an HDR transfer function, and
this tool will not work on those videos. If you did not grade your own content in HDR, or don't know what it means to color grade a video, you should not use the YouTube HDR metadata tool.
If you are grading your video, take care to grade in Rec. 2020 with PQ or HLG. Using a different configuration, including DCI P3, will produce incorrect results.

Once a video has been properly marked as HDR, uploading it follows the same process as a normal video upload. YouTube will detect the HDR metadata and process it, producing HDR transcodes for HDR devices and an SDR downconversion for other devices.

Note: HDR videos currently can't be edited with YouTube Web editor.

HDR video requirements
Once you upload a video, YouTube supports all resolutions and will auto-convert HDR video to SDR videos when necessary.

"

This is EXACTLY how my system is set up. Sound is working perfectly but the video is flashing. Not a constant flash but mainly a black screen then as if the HDR mode keeps resetting, the banner in the upper right corner of the screen signifying hdr has
initialized will get brighter, image that should be showing on screen will appear for a split second and then back to black screen all while the atmos sound never waivers.

Only on YouTube. Randomly when watching videos. Black screen for a while, and the booting screen shows up.

Ihave the same problem if i record 4K HDR video on xbox series x to my HDD and then try to upload on youtube :

Processing abandoned

The video could not be processed

4K SRD works but its have more black screen :

https://www.youtube.com/watch?v=Fyspsmo4-xI

I hope they patch this in furture .

Can you foward this threat to the peoples who solving this ? pls

I need to know its problem to be patched or its problem in consoles and need to be replace ( damage console ) this is kinda big problem .

unfortunately this is a youtube problem i would try and contact them

This is not true, the problem here is not with YouTube.

I have 5 sources of HDR videos, all which work just fine with YouTube, except for Xbox One X DVR.

The problem is with the substandard way Xbox encodes and describes HDR metadata in the produced MP4 file. And this should be fixed.