I hate to be the wet blanket on a very nice build, but as it stands, real off-road fat bikes are a niche market to begin with. (not talking about the typical Chinesium 70 pound plus monstrosities with no-name fat tires on them that are sold these days). Add a recumbent fatty into that mix and I think of how many numbers that BikeE sold of their off road model recumbent, the FX, which I purchased new in 1999 or so. It had to be a very small run of that dual suspension recumbent. Yours is a double niche-a very high quality fat bike build.....and it's a recumbent.
I still have my BikeE FX off road recumbent, so I know that riding position well. Going on long straightways on dirt or asphalt was no problem. The low speed manuevers was where the problem lies with an off road recumbent. (anything under 5 mph) Somebody smarter than me can describe it better, but when your speed slows, say, to get around some puddles or pot holes or rocks or roots, you lose that gyroscopic event.
End result, being I never had so many slow speed fall overs/tip overs as I did riding the BikeE. Especially so as I was clipped in with Shimano SPD pedals. I'd be curious about your own honest assessment with low speed handling of your bike. I've noted in your riding video, you come upon a set of water puddles on the path to where you've slowed to steer around them, but you then cut to another section on the trail.
As a long distance, canal towpath/MUP cruiser, I can see alot of comfortable miles done on your design. I believe that is where your bike will shine. I hope you share some more riding clips of what is a very unique and well built bike.