Split up a chord & a half last year like that. Tried a chain & bungee and keep slicing the bungee in half. Some of the wood is from the bottom of the trees where I'd cut to fell them, so, not a straight cut. Finally used a chain & metal spring, then I could straighten the spring with pliers if it got hit.
Wish where my splitting was done was level like in the video. I do it on the side of a hill, put the wood uphill on a 'shelf' I dig out. Reason is, besides living on a mountain slope, that's close to where I build the piles.