Is there a way to edit quickly Promoted Links? Because editing item by item is quite long. I was thinking data sheet view but can't make it work.
You can click on All Promoted Links view and then Choose Edit.
This will bring up the Data Sheet View.
Another option is to edit the "All Promoted Links" view. I always modify that particular view to include the out-of-the-box "Edit" button. It makes it quick and easy to access a promoted link item's edit form.