In P4V I can select a file, view its history, and use the options under the "show branch history" button to see changes made in other branches.
When I select a directory however, the "show branch history" button disappears. How do I view the history over different branches of all the files contained under a directory?
Probably easiest to use Revision Graph to do this. It'll let you follow the path of all of a folder's files back into other branches (can also do it recursively if there are subfolders).
Be warned: the output can get intense if there's a lot of other branches, and/or a lot of files. There's a filter on it so you can narrow down which files you care to look at though.
