My guess is its a joke, or the guy had it hit the house. Otherwise why post everything up to this point and then quit. Didn't look like a hard tree to begin with. But then I guess that's what youtube fail videos are made of.
Very good chance of getting the saw ripped out of your hands, he just needs to raise the notch.So assuming that the barrel is now on the ground (which ever way it fell)... If I had been asked to deal with it I likely would've cleaned up the notch & made a bore cut as indicated in red (being very careful not to cut up past the back cut).
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Assuming it was done properly can anyone see any reason that would be a bad idea?
To the OP, I'm not advocating this as if the cut wasn't made just right it would only further complicate things.