That's not a final montage. Sometimes, editors share a rough cut with the director/studio/client so they can see the path the product is taking, so they can forsee the aspect and the tone of the final result.
Sometimes, as in this case, it is noticeable that there are still things to polish and work to do with the material. In others, however, the montage is so good or is so close to being the final version that it is difficult to differentiate it from a finished video.
An anecdote regarding to this topic; It is said that there is a Spice Girls video ("Who do you think you are") that is actually a rough cut. When it was sent to the record company to show them what the finished video would look like, they gave it the green light directly and it is the video that was released to the general public.
