Lost the Search For "All Movies" icon from the Finder window.

When I used to GO to Applications there was a "search for" option on the bottom left where I could click on "All Images"or "All Documents" or "All Movies". My son went to drag "All Movies into the main body and it literally went "pooof" and is no longer there. And I can't find a bunch of movies that was previously there. How do I get that option back? (it was next to a little purple box with a cog in it) or is there another way to see all movies on the computer . Thanks.