FTS means flight termination system. Meaning the thing that blows it up if it goes off course and is going to crash into people. They were saying "safed" not "saved", meaning, no longer armed.

She said "Stage 1 FTS has been safed".

FTS is the flight termination system. I believe that is a self destruct mechanism in case things go very wrong. They arm it before liftoff and disable it after it's well over the ocean.

Safed.

Meaning switched off from being armed.