The trivial way would be 
rename 'Jane Doe & John Doe - 124 - How to Invest.mp4',
       '[Books] 124.mp4'
    or die $!;

[download]

See rename. Or is there something more you haven't shown?

map{substr$_->[0],$_->[1]||0,1}[\*||{},3],[[]],[ref qr-1,-,-1],[{}],[sub{}^*ARGV,3]

In reply to Re: Removing characters in a file name by choroba
in thread Removing characters in a file name by andy2020

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