2016-01-18, 23:13
Easiest way is to create a shortcut to the global search addon ('Choose Shortcut' > 'Add-ons >' > 'Program >' > 'Global Search'). You can limit it to searching only movies by then adjusting the action ('Change Action' > 'Custom Shortcut >' (last item in the list)) to:-
See here for more details of different options for the addon.
Code:
RunAddon(script.globalsearch,movies=true)
See here for more details of different options for the addon.