Song Help Request Looking for song based on riff in a video

This is a very stupid question, but I've heard a little sound riff in a video, which the guy playing described as "ukey". I want to know what song this is, somehow I've heard it before but I just can't figure out where. Drives me crazy!

Anyway, here is the video, the riff starts around 12 seconds into the video, it is pretty short so no need to watch the whole video:
http://www.youtube.com/watch?v=ZXRtU9pQixw

One last push then I let it die...

Sounds loosely like a bit of either 'Ain't She Sweet'
or 'Five Foot Two'.Both easily available online,both
easy ukulele pieces.The guy has a you tube site that
the video is featured on,why not contact him direct
and ask?