Only the first three minutes of the 15 1/2 minute video are climbing. As an owner of a bottom of the barrel front-hub hardtail, that's the part of the video I'm most interested in. The rest is just him hauling serious ass on level or downhill dirt roads at 30-50 mph. 50 mph no thanks, climbing, yes, I'm interested.
I must be horrible at Googling or something because I've spent a while looking for e-mountain bike climbing videos and the vast majority are pathetic. As in they are on pavement, which doesn't count!, or there is some race on dirt in a straight line, or they compare mid-drives to a hub drive and then don't even bother to mention which bike is which, and then show only the backs of the bikes about 50 feet away from the camera. FYI the hub drive bike kept up fine in that one on gentle rolling hills. But still a tad frustrating.
This video is different. This gives me (and others thinking to buy a mid-drive) a good look at how a high-end mid-drive climbs the real stuff. And I count fire roads as the real stuff for climbing. What did I learn?
The Levo does climb better than my front drive bike, but not by much. There were some loose/embedded rocks and some ruts/channels that this guy had to navigate, he did it about the same or slightly better than I would have. In the three minutes of climbing video, I'm pretty sure I would have gotten up with no issues, maybe as fast, maybe a couple mph slower, but within the ballpark. That's encouraging for a hub drive owner.
The times I get into trouble and have to get off the bike is when it's really steep, like 12%+ and too much loose stuff, or when the channels/ruts get big, like more than 8 inches wide and/or deep, that it's hard to roll over them going uphill. This video didn't have conditions like that, so he made it up, and I could have as well on that hill. He looked like he was pedaling a lot faster than I do, maybe my uphill cadence is 40-60. He would have walked away from me on the Levo uphill, but not ran away. He also sometimes had the front tire slip on some small obstacle and had to correct with handlebars. Very similar experiences on my uphill climbs, just like on a normal bike. The difference is that an e-bike can save you with continuing forward e-watt progress.
Overall I'd say that if you compare three types of motorized bikes: a dirt bike, a mid-drive mountain bike, and a hub mountain bike, my guess is that the mid-drive climbs at least 70-80% closer to a hub-drive than it does to a dirt bike. I originally thought maybe it would climb 50% normal bike / 50% dirt bike, but it looks more like 80% bike / 20% dirt bike. Which means, sorry if this appears to be biased, but the Levo is a bicycle. It's not a dirtbike, it does not climb like a dirt bike, it does not have the traction of a dirtbike. If you don't believe that, look at the video of him struggling over relatively small obstacles uphill. Dirtbikes climb that stuff in their sleep.