And whoever posted the film didn’t notice that the upload was taking longer than it should and didn’t bother to check it afterwards.
So it seems more likely that somebody (possibly a now unemployed somebody) made a major mistake and uploaded the wrong thing.
This mistake wasn’t over quickly either, as the full movie of Khali the Killer was up on the Sony Pictures YouTube channel for hours before finally being taken down, according to Entertainment Weekly.
Why the film’s file would even be accessible in such a way where it could be mistaken for the trailer is another matter.