application/octet-stream ; echo %s "can be anything..."
text/plain               ; cat %s
text/html                ; lynx -hiddenlinks=merge -list_inline -assume_charset=utf-8 -display_charset=utf-8 -dump %s; nametemplate=%s.html; copiousoutput;
application/pdf          ; llpp %s
image/*                  ; sxiv %s
audio/*                  ; mpv %s
video/*                  ; mpv %s