GH5 10bit 6K 2X anamorphic transcoding - HELP!

[buggz]

Hello,

I am trying to transcode GH5 6K 10 Bit - 2X anamorphic video, to something sane for the average person to playback.
VLC playback does not these files.
I'm guessing I need to transcode them to 1080P for the average TV to play them properly?
This should also be good for VLC playback, I would hope.

BTW, I am on a windoze PC, STILL Win7PRo, as I refuse to go to Win10.
I am also a hobbiest with a very stressful fultime job, so not much time to perform all of this properly.
Sigh, how I would love to to do this fulltime!

My biggest questions invove aspect ratio and rescalling.
Not really understanding this properly.

The excellent Mediainfo application reads the native files, MP4, as:
Format                                   : MPEG-4
Format profile                           : Base Media / Version 2
Codec ID                                 : mp42 (mp42/hvc1)
Bit rate                                 : 192 Mb/s
Format                                   : HEVC
Format/Info                              : High Efficiency Video Coding
Format profile                           : Main 10@L6@High
Codec ID                                 : hvc1
Width                                    : 4 992 pixels
Height                                   : 3 744 pixels
Display aspect ratio                     : 4:3
Frame rate mode                          : Constant
Frame rate                               : 29.970 (30000/1001) FPS
Original frame rate                      : 59.940 (60000/1001) FPS
Color space                              : YUV
Chroma subsampling                       : 4:2:0
Bit depth                                : 10 bits
Bits/(Pixel*Frame)                       : 0.343
Color range                              : Full
Color primaries                          : BT.709
Transfer characteristics                 : BT.709
Matrix coefficients                      : BT.709

I am using ffmpeg - ffmpeg-20170915-6743351-win64-static

ffmpeg.exe -threads 4 -i "F:\pics\GH5\2017-15Sept-homecoming\6K\copies\P1077002.MP4" -r 29.97 -vf "setdar=dar='2.666:1/1',scale=w=9984:h=3744,colormatrix=bt709:bt470bg" -c:v prores "F:\pics\GH5\2017-15Sept-homecoming\6K\copies\P1077002-transcode.mov"

Is this correct?
The thumbnail seems to be close.

I used the prores output as I wanted to try Davinci Resolve.
Though, I know I need to output 1080P to give to my family and friends.

[buggz]

This works perfectly:

D:\ffmpeg-20170915-6743351-win64-static\bin\ffmpeg -i P1077005.MP4 -vf scale=1920/1080,setsar=1/1,setdar=2.6667/1,colormatrix=bt709:bt470bg -pix_fmt yuv420p -c:v libx264 P1077005-ffmpegHD.mp4

NOTES For other formats:
A DCI 4K stream is compressed using JPEG2000, can have a bitrate of up to 250Mbps, and employs 12-bit 4:4:4 color depth.
4K=4096/2160
UHD=3840/2160
HD=1920/1080