Thanks for posting the sample. My analysis is definitely amateur, while others may have a lot more insight.
Taking a look at your sample, the most likely answer to it not playing correctly is that there are some aspects beyond what each player supports. The Plex Support Articles are unclear on the maximums allowed for every player you listed, and we’d need to ask someone with inside knowledge to be sure. See also the forum topic answered by @tom80H
What media formats does Plex support …
What I noticed right away:
- Main10@L5.2@Main for HEVC - Players might support L5.1 or L5.0 maximum which is a lower bit rate
- DV Profile 8.4, HLG compatible - I’ve never had a HLG video play smoothly. I don’t know if only DV Profile 8.1 is the max supported.
- Frame Rate Mode Variable - doubtful where it varies from 30fps to 60 fps.
- Transfer Characteristics HLG - very rare. Most common is PQ
- Mastering display color primaries - missing (commonly is Display P3)
- Mastering display luminance - missing
- Maximum Content Light Level - missing
- Maximum Frame-Average Light Level - missing
Video
ID : 1
Format : HEVC
Format/Info : High Efficiency Video Coding
Format profile : Main 10@L5.2@Main
HDR format : Dolby Vision, Version 1.0, Profile 8.4, dvhe.08.10, BL+RPU, no metadata compression, HLG compatible
Codec ID : hvc1
Codec ID/Info : High Efficiency Video Coding
Duration : 13 s 367 ms
Bit rate : 50.7 Mb/s
Width : 3 840 pixels
Height : 2 160 pixels
Display aspect ratio : 16:9
Frame rate mode : Variable
Frame rate : 59.850 FPS
Minimum frame rate : 30.000 FPS
Maximum frame rate : 60.000 FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 10 bits
Bits/(Pixel*Frame) : 0.102
Stream size : 80.7 MiB (100%)
Title : Core Media Video
Writing library : HEVC
Encoded date : 2025-10-06 20:50:34 UTC
Tagged date : 2025-10-06 20:50:43 UTC
Color range : Limited
Color primaries : BT.2020
Transfer characteristics : HLG
Matrix coefficients : BT.2020 non-constant
AmbientViewingEnvironment_Illuminance : 314.0000 lux
AmbientViewingEnvironment_Chromaticity : D65
Codec configuration box : hvcC+dvvC
Audio
ID : 2
Format : AAC LC
Format/Info : Advanced Audio Codec Low Complexity
Codec ID : mp4a-40-2
Duration : 13 s 367 ms
Source duration : 13 s 421 ms
Bit rate mode : Constant
Bit rate : 128 kb/s
Channel(s) : 2 channels
Channel layout : L R
Sampling rate : 44.1 kHz
Frame rate : 43.066 FPS (1024 SPF)
Compression mode : Lossy
Stream size : 215 KiB (0%)
Source stream size : 216 KiB (0%)
Title : Core Media Audio
Encoded date : 2025-10-06 20:50:34 UTC
Tagged date : 2025-10-06 20:50:43 UTC
The other helpful bit of information you can provide is your Plex Media Server.log zipped up and dropped into the thread. It will show us the decisions that PMS is making based on the player capability (whether it is Direct Played, Direct Streamed, or transcoding, etc). My guess is your other DV videos that play smoothly have much more common technical specs. You could
- Enable PMS debug mode
- Disable PMS verbose mode
- Restart PMS
- Play this sample clip you attached.
- In the hosted web app Settings → Troubleshooting → Download Logs
That makes for a concise clean log for the developers who might be interested.
I would encourage you use Mediainfo to examine a few DV videos that play well and compare the characteristics I noted above. Nothing wrong with you posting the output of one into a code block here to show where I was incorrect. Fwiw I would have expected iOS videos to play smoothly through Plex back to iOS but you know 
