Splicd

I'll take the cue from George in the post below.  If you want to show a portion of a Youtube video, all you need to do is to go to Splicd and enter in the url as well as the starting and ending point and you can omit the rest of the video.  For example if George wanted to start the video below at 10 seconds and end it at 5:01, here is what it would look like.