Videos can be faked too, though it's much more difficult to fake a video because a video is nothing more than a series of still pictures - to fake 10 seconds of video you have to fake about 250 still images.
Take a look at this video:
Do you think it's a fake? I've looked at it very carefully and I'm still not sure - I can't really see any discontinuity that would prove this. However this video has aroused a lot of interest and there are several YouTube videos and websites that will try to convince you that it is a fake, a 'viral video' designed to promote the clothes brand KillaThrill (the name appears prominently in the video).
Check out:
http://www.youtube.com/watch?v=LrTCBiB0bOI&playnext_from=TL&videos=oYhHUqz2ttI
http://www.youtube.com/watch?v=qvBep7-gi5s&feature=related
http://www.youtube.com/watch?v=bzMXjlBXJeo&playnext_from=TL&videos=Moqig5LN2_g
http://www.snopes.com/photos/airplane/onewing.asp
http://www.hoax-slayer.com/one-wing-plane-landing-video.shtml
http://www.jamesandersson.com/video02.html
My position is that of course it's possible to produce a convincing fake video but that it's difficult and expensive - many hundreds of thousands of dollars to fake a video as convincing as this (at 2010 prices). Would this clothing company have really spent so much to make a video that was never shown on TV and only became known through YouTube?