Can't be possible. Things they say:
- Photons have no mass
- They are using their "momentum" and "energy" to propel the object
These two points are directly contradictory. Just do a quick search of momentum real fast...
"In classical mechanics, linear momentum or translational momentum (pl. momenta; SI unit kg m/s, or equivalently, Newton second) is the product of the mass and velocity of an object." p=mv - https://en.wikipedia.org/wiki/Momentum
You cannot have momentum without mass. Basically all there will be is a lightshow. Also this theory has NEVER been replicated in tests. I accept all forms of comments/critique