Please Read The Short Instruction
Take a screenshot or photo of a scene from the movie (if you want to search by photo, take the clearest photo possible with the camera facing the screen). You can also use an image of a scene from the movie that you found on the internet. Crop the image to the edges, to get rid of the extra parts (leave only a scene (frame) of the film). Upload the image to the search. Wait for the search to finish and you will see the name of the movie.