Child Car Safety Seats : If I want to use a hand-me-down child safety seat, how do I check the quality?

Stephanie Tombrello (Child Passenger Safety Educator & Executive Director, SafetyBeltSafe USA) gives expert video advice on: What qualities should I look for in a child safety seat? | Is it safe to use an old or second-hand child safety seat? | Can I still use a child safety seat after an accident? and more...