From the 28 release notes;
28.0: 10-bit and HDR Video Encoding Support
OBS now supports 10-bit and HDR, courtesy of rcdrone, YouTube, and Luxoft. New color format and color space settings have been added in the advanced settings to allow this.
Important notes about HDR and 10-bit:
- HDR and 10-bit can only be encoded with AV1 and HEVC encoders.
- The recommended settings for HDR are Color Format P010 and Color Space Rec. 2100 PQ.
- If you wish to encode 10-bit SDR, you can use Color Format P010 with an SDR color space (e.g. Rec. 709, Rec. 601). However, AV1 or HEVC will still be required.
- HDR streaming is currently only supported via YouTube's HLS service via an HEVC encoder.
- When composing in SDR, games that operate in HDR can now be properly tonemapped to SDR.
- Video capture devices can be used to capture and stream in HDR if the device supports it (e.g. EVGA XR1 Pro, Elgato 4K60 Pro Mk.2, AverMedia Live Gamer 4K).
- Certain filters will not function if a source is rendering with HDR:
- Apply LUT, Chroma Key, Color Key, Image Mask/Blend, Luma Key, Sharpness
- Mac/Linux support is limited. HDR preview does not work, and several inputs/encoders still need to be updated.
Of course, you need a system to be capable of HDR, including the monitor.
You still need to provide a crash report and a log file.
If there's no crash report then most probably the crash is outside OBS.
As soon you open OBS a log file is generated. If you see no log files then something in your system is preventing OBS to function.
Streams at 0Kbps are usually due to netwrok issues. It could be in your home network or the ISP.
As you're not showing a log file it's imposible to try to figure out any of this.