Understandable.
I did watch the whole thing. Although they were short on technical details to protect their IP (Intellectual Property) what they were willing to disclose was pretty interesting.
Patent pending status does provide some protection, but it is prudent to hold off to actual issuance of the patent or require an NDA before disclosing. I've done the same on my own IP recently.
The secret sauce seems to be the solid electrolyte.
Given the discussion it sounds like a polymer with carbon nanotubes incorporated into the molecules. If that stuff is a little bit squishy and springy that would solve the contact to not perfectly smooth electrodes, and the thermal mismatch issues.
They assert there is no cobalt, nickel, or lithium in the cell.
I'm guessing they are using sodium for the active ion. Dirt cheap, and the slightly fatter atomic size helps keep it from penetrating the separator or growing dendrites in it.
My take and opinions, YMMV...
MMDV
... they were short on technical details...