The video was not at the best angle to see what actually happened, but it seemed to me that the fall stalled when the notch closed. An open-faced notch of 70°-90° would probably have allowed the tree to fall without stalling, and would have steered the trunk almost all the way to the ground without tumbling at the end.
Will not get into a debate, many of you have more experience, and perhaps much more expertise than I. But, this particular tree hung on branches of another tree, primarily because of that large kink in the tree that can be seen in the still picture after it is on the ground. The hinge seemed to have worked fine (at least to me) until that left turn in the tree reached out and caught on another tree. I didn't have much room to get it down between the other trees around it, and frankly missed slightly. Sorry fellows. I'll continue to practice, and hope to get better. I'm still splitting that tree as I took down a couple that day, and haven't yet cut the stump off. I'll take a picture of the stump without the saw sitting on it that still shows the hinge and add it here later.