I think the strands at the end would hold it up, but it would be interesting to see a 16"-20" diameter log go through that thing. My wedge does not extend far enough, (Speeco/Huskee by design-safety maybe ?) with the hydraulic cylinder, to clear the split pieces, or should I say completely sever them, just Elm does this. Thats mostly the case when the grain is twisted, which seems to be prevalent, but not always the case, some is straight grained and splits just a tad more difficult than other species, relatively easy compared to some elm, depends on the log. Then there are pieces that you do not want to send the wedge through the middle of the log, far better to make planks from the edges, then go for the center. I have made some nice elm blocks to finish with a rip chain, skip chain or what have you, by doing this with the splitter first. Even the worst crotch wood, this splitter will power through, split or shear. I find that lining the wedge up with any visible fracture in the wood helps a lot. I find with elm that I fuss more with this, seems to eliminate having to sever so much with a hatchet, by closely watching how you line up the wedge to the log, nice to have it bucked and drying a little to see those small cracks. I'd not be able to split it fresh with a hammer and maul or similar, partly why I finally went for a hydraulic splitter, that and the darned shoulder joint LOL !
Dutch Elm Disease has killed most of the 30 year old Elm trees here recently, so I've cut down every one I have seen before they punk, I think you have maybe a year or so, trunks on Elm are strange in that respect, but even punked, partially punked, its still viable wood to burn, you just need more of it. It was a learning experience to process fresh or cut live elm, a sharp hatchet to sever pieces, patience and time as it takes longer than any other wood to split, unless you can buck it, then let it dry in warm weather. Seems in the stack it will soak up water like a sponge, have to keep a cover on it once dry. Certainly is an art to process sometimes, but it does make a good firewood when cut before it punks, makes a good coal bed, similar to oak, just not as long lasting.
The logs in the video look like black cherry or similar, easy splitting.