[Cin] Smaller HEVC HDR test file

[Andrew Randrianasulu]

https://cloud.mail.ru/public/pgQ6/g4XNRF3ye

I created smaller 18 mbytes  test file (actually 480p) for testing, like this

~/bin//ffmpeg8-vk -i
~/K38_sdcard1/Documents/iPhone11_4K-recorder_59.940HDR10.mov -vf
scale=-2:480  -c:a copy -c:s copy -c:v libx265 -t 25 -g 5 -crf 20 -f
mp4 /dev/shm/hevc_720p.mp4

If you look at it WITHOUT tonemapping it will look very washed out.

If you add tonemapping it will look much more lively (all on SDR
display of course)