Sharing a Youtube video with your friends is really easy, whether you want to send it by mail, share it on social networks or publish a link to the video on your blog.
Click on "Share" button below the video to get the URL.
If you want your friends to view a specific portion of the video, here's how to set the starting time.
Check the box before Start At and set the starting time:
As show is the example below, the URL of the video will be modified according to the starting time: