Comment by CamperBob2

RF is not an issue, but X-ray emission is indeed a problem that had to be confronted by TV engineers back in the day. A rule of thumb is that a color TV needs about 1 kV of acceleration voltage per diagonal inch. 43 kV is no joke when it comes to X-ray generation, so I'm curious if they found a way to make it work at a lower voltage.

At one point in the video you can see that the TV has two second-anode leads, so maybe that was the trick, using two separate acceleration electrodes at half the voltage.