The video itself is fine, but I want to especially post some of the links in the comments.
From Quentin Finck:
“Could the Epstien drive just be an improved Ad Astra Vasimr drive http://www.adastrarocket.com/aarc/VASIMR It would make some sense as the fusion reactor would provide the power for the drive. With about 200 years of improvement on the basics of it, I would think that it would fit rather well as the Epstein drive.”
“https://arstechnica.com/science/2017/02/nasas-longshot-bet-on-a-revolutionary-rocket-may-be-about-to-pay-off/ Try this article on Ars Technica. It goes into some of the details.”
From Ben Wiilliams:
“recently there was a paper published that essentially used a primary reaction in a doughnut shape with the force forced inward to ignite a secondary reaction that directed the force out the back. If a system like that was made effective, it would surely provide those kinds of accelerations.”
“http://www.nextbigfuture.com/2017/04/imploding-liner-fusion-propulsion-system.html I misspoke about initial reaction. Though, I suppose the electricity to run the magnets would come from a fusion generator.”
Of course, I’m personally still fixated on the EM