Here are the correct gestures to use:
Put your hands together as if you are praying, then unfold them flat.
Form an imaginary lens with one hand while cranking the other hand as if you are operating an old movie camera.
Making a box with your hands.
Make quotation marks in the air with your fingers.
To indicate the word sounds like another similar word, pull on your ear or cup your ear.
Number of words in the title:
Hold up number of fingers.
Again hold up the number of fingers - for example for "Gone with the Wind" you would hold up 4 fingers for four words and then prior to acting out "wind" you would hold up 4 fingers again to indicate 4th word.
Hold a specific number of fingers against your arm for a given word.
Pinch your thumb and forefinger together.
Open your fingers to indicate a long word.
Give a thumbs up and point to the correct guesser.
Wave your hand like a fan.
Cross your arms and shiver.
Other signals are allowed if agreed upon before the game.