It is a good falsification but not good enough to escape close scrutiny.
Whatdefuck.com has uncovered the truth behind the military film that I already hinted as likely fake (just because they have the power to create such illusory media, without really looking much at it admittedly).
Look carefully at the details of the ship, the Israeli model is either a good decoration or even another ship of the same model, very similar in any case, but they are not identical. Particularly obvious is the lack of the ship's name "Mavi Marmara" but there are many other differences:
Found via Window into Palestine.
Considering that the video was released only a few hours after the attack, this must have been filmed prior to the actual massacre, maybe in a training exercise.
It adds evidence to the widespread belief that the murders had been planned in advance.
WiP also informs of newly released video footage of the Mavi Marmara massacre and witness Lara Lee's report at Democracy Now!
It also has an extensive report on the origins of Zionism which I found very interesting.