You don't HAVE to move them, but I think it would simplify things later if you plan on using more video functionality. The Metadata plugin for Movie and Series tagging and art downloading depends on a directory structure with each item in it's own directory. Just to mention one. . If you don't see yourself using anything like this it will probably not be a big problem. But it should not be a huge task with the copy, move and replace tools though.
Just test it out with a very few files first.
- Select files (movies AND images etc. Need to make a view to show it all)
- Right click and select Tools, Rename, Move & Copy Files
- Mark Directories
- Select your base Movie folder. Example D:\Movies
- Set the rule as what the directories should be named by: [Name] ([Year])
I'm not totally sure what will happen to the images if you have any in the movie directory though. I've also not tried this method my self before, but I think it should work