CLOSED: Most beautiful singing bird

Hi, I unfortunately don't have a picture to share, this bird rarely lands in our trees but when he does he's immediately heard. He's about the size of a dove, with dark grey feathers. And, unless I'm mistaken, has a little bit of yellow beneath his tail.

There's a YouTube video I found a long while ago, http://www.youtube.com/watch?v=anwtJ9EOF-M where you hear this bird right in the beginning, at about 2 seconds. It's the most clear sound so you can't miss it.

Please help me identify it!
Devon

Yorkey...try this one - Bokmakierie Telophorus zeylonus

Here's what it looks like & sounds like:
http://www.youtube.com/watch?v=expbA3VLngk

It sounds very similiar, but that one is definitely not the one in our trees. Thanks for your help!