지만 마치다

sadly, it's time to wrap up

All four lines here are the same sign-off: 아쉽지만 마칠 시간, "it's a shame, but it's time to finish". "-지만" is "but", 아쉽다 is the regret of something ending, and 마치다 is to finish or close a session. This is the fixed courtesy for ending a broadcast, a stream, or a lesson — the regret is a politeness, not a report of real disappointment, and listeners hear it as the signal that the show is over.

Register: set closing phrase, polite