A user can find the full movie of Stephen King's "It" on YouTube, as of September 2015. However, the movie may be removed if it is determined to violate the site's copyright policy.
To watch the movie, a user needs to enter the term "Stephen King's It full movie" in the search box and hit the Return key or click on the magnifying glass button. The first result on the page is the full movie. There are also other results pertaining to the movie, but they contain only certain parts of the movie or a few highlights from the movie, but not the entire movie. If the full movie gets removed in the future, the remaining option is to watch it part-by-part on YouTube.