I currently have a bash script to sort downloaded video files into separate sub dirs for TV shows and films.
There is a lot more to the script, however the main sort function for detecting short videos simply from file size is below:

Of course it's easy for this form of sort to get it wrong, especialy if sorting files that are not 1080P.
I've recently found the following bit of code:

This returns the length of video files in seconds. Therefore it's a much better way of detecting TV shows from films, ie anything below 4,200 seconds (70mins) is a TV show, anything above is a film. Again not fool proof but better than doing it via file size.

What I'm attempting to work out is the syntax for how to initiate a mv command for any file that ffprobe returns a length in seconds under 4,200.

Many thanks for any help.
Tim

Why not try mediainfo - this gives copious info, so something like might give

I recently wrote a script for something like this but I was using the audio channels as my key. Make your command into a variable and use if statements.