You may know Phil Plait as the Bad Astronomer, but he has a great new YouTube astronomer series out called Crash Course Astronomy.
Crash Course Astronomy Episode #1
The series just started and right now there are two episodes out. I checked out the first episode and it is a fantastic introduction to astronomy for the non-science person. The episodes are not long. The first episode is 12 minutes, so you can easily find a time in your or your kids' schedule to watch them.
To top things off, Phil Plait is a great advocate for science education and does a fantastic job explaining difficult concepts in a very understandable way. Plus he shows passion and is genuinely excited about astronomy. Combine all of this together and you have an excellent astronomy YouTube series! Check it out!