I was converting with HandBrake some videos taken with a GoPro camera in order to reduce their sizes, when I noticed that when played they have different colors :
- the original GoPro videos are over saturated with dark midtones
- the converted with HB are desaturated with light midtones

At first I thought it was a conversion issue, but then I realized that the colors of the original one weren't correct either.
The issue appears only with certain players, like PotPlayer and also VLC, while Microsoft Movies & TV reproduce them correctly, both with the same and right saturation and brightness.

I leave the log of the files here.

ORIGINAL:
Format : MPEG-4
Format profile : Base Media / Version 1
Codec ID : mp41 (mp41)
File size : 467 MiB
Duration : 1 min 5 s
Overall bit rate mode : Variable
Overall bit rate : 60.3 Mb/s
Frame rate : 29.970 FPS

Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L5.1
Format settings : CABAC / 2 Ref Frames
Format settings, CABAC : Yes
Format settings, Reference fra : 2 frames
Format settings, GOP : M=1, N=15
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 1 min 4 s
Bit rate mode : Variable
Bit rate : 60.0 Mb/s
Width : 3 840 pixels
Height : 2 160 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 29.970 (30000/1001) FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.241
Stream size : 465 MiB (100%)
Title : GoPro AVC
Language : English
Encoded date : 2024-02-25 22:23:17 UTC
Tagged date : 2024-02-25 22:23:17 UTC
Color range : Limited
colour_range_Original : Full
Color primaries : BT.709
Transfer characteristics : BT.709
Matrix coefficients : BT.709
Codec configuration box : avcC

------------------------------------------------
CONVERTED:
Format : MPEG-4
Format profile : Base Media / Version 2
Codec ID : mp42 (mp42/dby1/iso2/avc1/mp41)
File size : 195 MiB
Duration : 1 min 4 s
Overall bit rate : 25.1 Mb/s
Frame rate : 29.970 FPS

Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : Main@L5.1
Format settings : CABAC / 5 Ref Frames
Format settings, CABAC : Yes
Format settings, Reference fra : 5 frames
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 1 min 4 s
Bit rate : 24.9 Mb/s
Width : 3 840 pixels
Height : 2 160 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 29.970 (30000/1001) FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.100
Stream size : 193 MiB (99%)
Writing library : x264 core 164 r3107 a8b68ebf
Encoding settings : cabac=1 / ref=5 / deblock=1:-1:-1 / analyse=0x1:0x131 / me=umh / subme=10 / psy=1 / psy_rd=1.00:0.15 / mixed_ref=1 / me_range=24 / chroma_me=1 / trellis=2 / 8x8dct=0 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=-3 / threads=30 / lookahead_threads=5 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / bluray_compat=0 / constrained_intra=0 / bframes=8 / b_pyramid=2 / b_adapt=2 / b_bias=0 / direct=3 / weightb=1 / open_gop=0 / weightp=2 / keyint=300 / keyint_min=30 / scenecut=40 / intra_refresh=0 / rc_lookahead=60 / rc=2pass / mbtree=1 / bitrate=25000 / ratetol=1.0 / qcomp=0.60 / qpmin=0 / qpmax=69 / qpstep=4 / cplxblur=20.0 / qblur=0.5 / vbv_maxrate=240000 / vbv_bufsize=240000 / nal_hrd=none / filler=0 / ip_ratio=1.40 / aq=1:1.00
Encoded date : 2024-03-15 21:48:03 UTC
Tagged date : 2024-03-15 21:48:03 UTC
Color range : Limited
Color primaries : BT.709
Transfer characteristics : BT.709
Matrix coefficients : BT.709
Codec configuration box : avcC

I'm not so expert, so I don't understand the meaning of all the values.
I had the same issue few years ago and I remember I solved changing the rendering option in PotPlayer (thanks to the suggestion of another post on this forum), but none of the options solved the problem this time. (last time the files where from a different camera, I had different hardware too, also PotPlayer was a different version).
What would you suggest? (other than starting to use Movies & TV app )
Thanks for the attention