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It's really not clear what exactly happened in that video.  We see someone slinging a hook over the power line, then we see a white picture.  We don't know what the cable was made of and where the other end really was at the time the hook reached the power line.

One possibility is that the cable was conductive and longer than the part that ended up in the air.  In other words, the bottom end of the cable was always touching the ground.  It also seems likely that the guy who flung the cable released it before it touched the power line.  That pretty much has to be true since it needed more slack to do that than he could provide swinging it around from his height.

Here is a likely scenario:  At the moment the hook touched the power line, the person had already released the cable from his hands.  Even if the cable was not insulated, as part of it was lying on the ground at the time.  That connection to ground would be much better than thru the air, to the person, then arcing around his boots.

If the cable was insulated with only the end touching the ground stripped, the above would apply even more so.

Your diagram is about danger from ground currents.  Those are highly unpredictable.  The picture is assuming a nice uniform ground resistance, which is rarely the case.  It also describes total resistance relative to a distance of 25 feet, and assumes some particular diameter rod driven into the ground.

It's not really resistance that matters, but ground potential between the two feet.  You need a diagram of ground potential as a function of distance, not resistance.

Let's say the guy let go of the cable so that it's far enough not to arc to his hands.  In that case the only electrical danger is the voltage offset in the ground between the two feet.  If the two feet are planted the same distance from where the cable touched the ground, then there is no offset between them.  Presumably the guy is wearing boots, so can actually tolerate significant ground offset under the soles.