On form submit callback onAdd from props should be called with new film object.
Also, form should be cleared. Page should not be reloaded.
(*) Add validation
validate controls values on blur
title, imgUrl, imdbUrl, imdbId should be required
imgUrl, imdbUrl - should be valid urls (can use this regex /^((([A-Za-z]{3,9}:(?:\/\/)?)(?:[-;:&=+$,\w]+@)?[A-Za-z0-9.-]+|(?:www\.|[-;:&=+$,\w]+@)[A-Za-z0-9.-]+)((?:\/[+~%/.\w-_]*)?\??(?:[-+=&;%@.\w_]*)#?(?:[.!/\\\w]*))?)$/)
invalid control should have red border and error message below
if form is invalid submit(and submit button) should be disabled
(**) show control as invalid only if control has been touched