Put into:
c:\Users\chiao\AppData\Roaming\LyX2.3\layouts\
Put into:
c:\Users\chiao\AppData\Roaming\LyX2.3\layouts\
cf: https://support.wolfram.com/12473
Remove the subdirectories:
ffmpeg -i a.mp4 -ss 00:10:57 -to 00:23:00 -c:v copy -c:a copy output2.mp4
Use kdnlive: