1. Go to Youtube
2. Search for the video that you would like to share
3. Copy the URL of the video. E.g. https://www.youtube.com/watch?v=VI7zpJDOaNM
4. Go to your post box and click on the "youtube" button
5. Paste the video URL E.g. [youtube]https://www.youtube.com/watch?v=VI7zpJDOaNM[/youtube]
6. Remove the "s" in https
7. Click the "Preview" button below, and you will be able to see the video