See the media info and see if everything matches or not.
M2TS that worked in VLC:
Format : BDAV
Format/Info : Blu-ray Video
File size : 3.99 GiB
Duration : 1h 43mn
Overall bit rate : 5 512 Kbps
Maximum Overall bit rate : 35.5 Mbps
Video
ID : 4113 (0x1011)
Menu ID : 1 (0x1)
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L4.0
Format settings, CABAC : Yes
Format settings, ReFrames : 3 frames
Codec ID : 27
Duration : 1h 43mn
Bit rate mode : Variable
Bit rate : 4 542 Kbps
Maximum bit rate : 25.0 Mbps
Width : 1 920 pixels
Height : 1 080 pixels
Display aspect ratio : 16:9
Frame rate : 23.976 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.091
Stream size : 3.36 GiB (84%)
Writing library : x264 core 105 r1732 2b04482
the one below didn't
Format : BDAV
Format/Info : Blu-ray Video
File size : 4.36 GiB
Duration : 1h 37mn
Overall bit rate : 6 373 Kbps
Maximum Overall bit rate : 35.5 Mbps
Video
ID : 4113 (0x1011)
Menu ID : 1 (0x1)
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L4.1
Format settings, CABAC : Yes
Format settings, ReFrames : 3 frames
Codec ID : 27
Duration : 1h 37mn
Bit rate mode : Variable
Bit rate : 5 313 Kbps
Maximum bit rate : 18.0 Mbps
Width : 1 920 pixels
Height : 1 080 pixels
Display aspect ratio : 16:9
Frame rate : 23.976 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.107
Stream size : 3.74 GiB (86%)
Writing library : x264 core 104 r1683 62997d6