Thank you for all these videos you just just made about the Sherman. Overdue thanks as well for all the other ones that I've been following over the years ever since the days of ACM washing (we've come a long way).
Regarding off trail, in the french video, at 1:58 it says the Sherman is precise for spots requiring technique. Starting at 6:07 he shares his feelings about the Sherman. The lights are very powerful , with a much wider coverage than than any lights mounted on other wheels right now. Great for off roading with the only downside that you can blind incoming people though the vertical angle can be adjusted.
Around 7:15 he says that for those who have an 'extreme' riding style the tire is awesome with an excellent grip and great for street riding as well as off road. He does mention that the tubular frame has to be kept in mind when off roading because while taking an obstacle facing head on is fine, hitting an obstacle with the side bars will make you fall. When it comes to jumping, don't expect MSX level agility especially if you pull the wheel while jumping because the Sherman is heavy, but you can jump using the speed and power of the wheel and pull it to a certain extent. For climbing steps, he says that it's doable, even without making too much noise (see demonstration). With some practice, you can lift the wheel and have the tire hit the edges of the steps and thus climb without too much trouble. Veteran is fairly tall so very stable but not as tall as the Monster so much more maneuverable : a good compromise.
On the tire again : very good on all type of terrains. The knobs are very comfy and since tightly spaced don't make too much noise. For off road riding, much better than an MSX with a regular tire. Safer and more comfortable.
Last detail : the trolley handle recedes inside the body of the wheel so in the case of a fall, it won't be so prone to breaking as is the case for the MSX handle .