lol, total BS. their "Nuclear reactor" is just a video of a tokamak, a fusion reactor..which ITER is currently building one which is the size of a masive warehouse and isnt expected to even produce a net gain for like 20 years.
This is some bullshit "futurism". those engines are so hilarious as well, as turbofans have been getting bigger and bigger for more efficiency. Name of the game today is hi-bypass not strap on a ton of engines.
This is different from fission reactors which we have on submarines and aircraft carriers..which that wouldnt work as well. If the US decided to just continually fuel B-52s instead of have a nuclear powered plane...theres a reason for that.