explainshell.com - find.1posix /data/movies/ -name '*.mp4' -or -name '*.mkv' -and -mtime +30 -and -size +1G -delete

/data/movies/ -name '*.mp4' -or -name '*.mkv' -and -mtime +30 -and -size +1G -delete

find files

source manpages: find