Link Videos from Share Box
Most common and easiest way to link videos from Share Box is on the activity stream on the Frontpage and Profile Page.
First, click Videos tab, as shown in the picture below:
Share Box will then change into form to allow you entering the video data:
Enter the video link, write something about the shared video, if desired, and then click Share.
Wait for a moment until the video is fetched.
Once the video is ready, the following screen will be presented:
At this point, you can still change the video, change the custom description, change the privacy settings, or abandon the linking altogether by navigating elsewhere.; however, if you're ready to link the video, click Share again.