Yes, it's acceptable if you make the subject title relevant to the grammatical or pronunciational point you're asking about, eg. "But if you believe?"
Yes, that's what she says. She might be saying 'look' or 'looks'. It's easy to swallow an 's' like that in fast speech. It's probably there in her mind, but didn't quite get to her tongue or make an impression on the microphone.
Student or Learner