About 17 minutes into it, he starts doing what I have had to do the few times I've had a tree hang in another tree.... start taking small pieces off the bottom from the back side, so that the butt keeps walking towards the tree its leaning against as you remove pieces. Eventually, you'll get to a point where the leaning tree will have more weight leaning away from the tree it's hung up in, and then it'll fall back in the direction it originally came from. If he'd have done that on the first leaner, he wouldn't have had to cut out all those other trees, or have had them all sprung against each other like that.
If he had a cable and a tractor or truck or come along that would have worked better and probably been safer than having all those spring poles in there. You never know when one will let loose and whip you to death.