Plasma physicist Pekka Janhunen points out in the comments that the losses in a traditional magnetic trap are high, this is what the Tokamak was invented for in

Plasma physicist Pekka Janhunen points out in the comments that the losses in a traditional magnetic trap are high, this is what the Tokamak was invented for in the first place. (That's also what the Polywell tries to solve). Haven't watched the video.