Helicity

The video spokesperson said they are a decade away but in reality, this was available a half a century ago. Star Wars directed energy research likely increased the efficiency greatly, but that data is of course, classified. Helicity knows this and the fusion reactor stuff is all fundraising when it is actually going to be used for what works…bombs.
Nuclear Pulse Propulsion by another name. They are trying to make a tiny fusion explosion without using a fission explosion to create fusion.

The original concept of Stanislaw Ulam was pure genius. He did not just think outside the box, he threw the box away. Pulse Propulsion is understood in three different ways.

First, nuclear energy cannot be used efficiently in a rocket type engine because it is difficult enough keeping a chemical rocket from melting. Nuclear energy is, literally, a million times hotter. Like a piston with no cylinder around it, Pulse momentarily hits the piston with plasma from a nuclear reaction. Not long enough to melt it, exactly like an internal combustion engine…an external engine.

Second, a nuclear device can be designed to focus most of the energy in one direction, like a conventional shaped charge. Directed at a slug of material the resulting plasma Pulse pushes the Spaceship.

Third, while a jet fighter is catapulted off the deck of an aircraft carrier, a pulse driven Spaceship is akin to an aircraft carrier catapulted by the jet fighter. This is accurate as Nuclear Pulse becomes extremely efficient the larger the plate, or piston, becomes. Using a multi-thousand ton plate several hundred feet across uses the same small device an order of magnitude more efficiently.

Helicity is likely going to use nuclear devices and this whole internal fusion design is a facade.