mdfind -0 -onlyin ~/Dropbox/ "(kMDItemFSName = "*.mp4" || kMDItemFSName = "*.m4v")" | xargs -0 ...
The red-hilited part can be replaced with:one liner in terminal
[COLOR="Red"]for i in $(find ~/Dropbox -name "*.mp4")[/COLOR]; do mv $i itunes_folder; done
for i in ~/Dropbox/*.mp4
I don't think it's enough to just move the files, if you want iTunes to be aware of them you need to import them. There is an "import to iTunes" action available in Automator though, and it's also available by default in the context menu on OS X if you select a media file.one liner in terminal
for i in $(find ~/Dropbox -name "*.mp4"); do mv $i itunes_folder; done