How to remove a prefix from multiple files?

Question

I downloaded a lot of videos that are named like [site.com] filename.mp4 and I wanted to remove the prefix so that they are named like filename.mp4

Answer 1

Just for completeness, a cmd.exe alternative:

For %A In ("*] *.*") Do @(Set "_=%A"&Call Ren "%A" "%_:*] =%")