This one is slightly improved over that other recent one, but this is still a dangerous device.

Rather than using momentum to drive a wedge into the wood (the classic way to split wood), it uses a blade forced through the wood at slow speed. The video shows the block jumping back toward the cross brace (0:08 .. 0:10) and as pointed out, it was nice straight grained wood.

How about splitting a fir 2x4 with a knot in it? How about what happens when it gets stuck? How do you unstick that blade? I'd like to see that on the video!!! I'd venture to say it wouldn't take much to stall the motor. The roller chain looks strong, so I'd bet that part would survive, so would the gearbox grenade itself? Would the motor stall burn out the motor? Would the welds in the frame come apart? Would the shaft bend?

Or, looking at how the bottom of the wood jumps back toward the guy's crotch (13:50), would the failure be of the operator (14:38 - he jumped back when it came for him)?