Go to the Forum in your Moodle site where you want to add the video.
Click the Start a new discussion topic button or the Reply link, depending on where you want your posting to appear.
Enter a Subject for your posting in the new window.
Paste the link to the YouTube video into the Message text box.
If desired, add additional text above and below the video link.
Scroll down and click Post to forum.
Embedding a video to a forum post
Instructors and TAs can embed YouTube videos so that they play directly in a Moodle Forum. Some other video services, such as Vimeo, also have this ability. Students are not able to use this method to embed videos into forum posts.
1 - Getting the video embed code
Before embedding a video in Moodle, you will need to get the video embed code: