On taking a close look at the video in full screen, it appears the cutter may have a properly oriented notch that should direct the tree away from the house, but if it is a notch, it is very small, less than 1/10 of the trunk diameter. Also, when the tree falls, a noticable 'barber chair' is left standing on the back side of the tree as viewed from the camera, which indicates that the backcut was not completed properly. Fortunately no one was killed, but that is an expensive way to do unnecessary home renovations!
Just so we're perfectly clear, this is NOT an example of my work!