The Order: 1886 Too Short?

According to a recent upload of the The Order: 1886's entire campaign by Youtuber PlayMeThrough,  the game has a campaign that clocks in at only around five hours.  This accounts for both gameplay and cinematics.  Check out the footage for yourself at the above link.  Obvious spoilers.

Andrea Pessino, founder and CTO of Ready at Dawn studios, has Tweeted about the leak saying, "I am done commenting on click bait rumors about game length, 'downgrade' idiocy and such nonsense.  Don't bother asking."

Is five hours too short for a full retail release?  Is PlayMeThrough just doing a speed-run of The Order?  Voice your opinions below in the comments.

The Order: 1886 comes out this Friday, Februay 20, 2015, exclusively for the PlayStation 4.  For more news and a full review, stay tuned to PBG.