Please provide a sample file. I think, these are 10 bit H.264 files.
Can't easily provide a sample, but here is the full video report from mediainfo for one of the files. I've removed some duplicate lines:
Video
Count : 342
Count of stream of this kind : 1
Kind of stream : Video
Stream identifier : 0
StreamOrder : 0
ID : 1
Unique ID : 3106936531486395817
Format : AVC
Format/Info : Advanced Video Codec
Commercial name : AVC
Format profile : High@L4
Format settings : CABAC / 4 Ref Frames
Format settings, CABAC : Yes
Format settings, ReFrames : 4 frames
Internet media type : video/H264
Codec : V_MPEG4/ISO/AVC
Codec : AVC
Codec/Info : Advanced Video Codec
Codec profile : High@L4
Codec settings : CABAC / 4 Ref Frames
Codec settings, CABAC : Yes
Codec_Settings_RefFrames : 4
Duration : 2933055.000000
Duration : 48 min 53 s
Bit rate mode : VBR
Bit rate mode : Variable
Bit rate : 9697631
Bit rate : 9 698 kb/s
Maximum bit rate : 15000000
Maximum bit rate : 15.0 Mb/s
Width : 1920
Height : 1080
Stored_Height : 1088
Sampled_Width : 1920
Sampled_Height : 1080
Pixel aspect ratio : 1.000
Display aspect ratio : 1.778
Display aspect ratio : 16:9
Frame rate mode : CFR
Frame rate mode : Constant
Frame rate : 23.976 (24000/1001) FPS
FrameRate_Num : 24000
FrameRate_Den : 1001
Frame count : 70323
Resolution : 8 bits
Colorimetry : 4:2:0
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Interlacement : PPF
Interlacement : Progressive
Bits/(Pixel*Frame) : 0.195
Delay : 0
Delay : 00:00:00.000
Delay, origin : Container
Stream size : 3555460848
Stream size : 3.31 GiB (94%)
Proportion of this stream : 0.93788
Default : Yes
Forced : No
Buffer size : 31250000
Color range : Limited
colour_description_present : Yes
Color primaries : BT.709
Transfer characteristics : BT.709
Matrix coefficients : BT.709