Code:
find /i-data/md0/Disk1/Films/ -name \*-trailer.mov -exec rename "-trailer.mov" ".[TRAILER].mov" {} \+
I've removed the
rename command options to adapt the command line to
rename available on my system. Anyway, the suggested command line should give you an idea on how to execute a command over multiple files recursively. Note the closing \+ makes the command to be executed once over the files all together. See man find for details.