Run FFmpeg concat demuxer:
ffmpeg -i "Young_Sheldon_S07E01_Source.mp4" \ -c:v libx265 -preset slow -crf 22 \ -c:a copy \ "Young_Sheldon_S07E01_Archive.mkv" young sheldon s07 ffmpeg
Sheldon realizes that to see his future self (who is actually his past self, which gives him a minor migraine), he must master the command line. He spends hours perfecting the syntax: ffmpeg -i Young_Sheldon_S07_E01.mkv -vcodec copy -acodec copy output.mp4 which gives him a minor migraine)
ffmpeg -i "YS_S07E01.mkv" -vf "subtitles=YS_S07E01.mkv:si=0" -c:v libx264 -crf 18 -preset slow -c:a copy "YS_S07E01_hardsub.mp4" young sheldon s07 ffmpeg
ffmpeg -i "Young.Sheldon.S07E01.mkv" -ss 00:01:15 -to 00:18:30 -c copy "YS_S07E01_cut.mkv"