Here's an interesting website I looked at today:
http://www.totlol.com/
It's a collection of videos that have all been screened and are deemed kid safe. The target audience is 13 years and under. It's an entertaining, kid friendly alternative to You Tube, with all the, uh, unsavory content omitted.
I only watched one video, but it was cute and child appropriate. So far so good - I'll definitely let my kids have a look at this site.