Blackboard (Students) - Mashup: Uploading Youtube Links Using Mashup
How to upload a Youtube link using Mashup.
In the discussion board forum, click the Create Thread button.
If you do not see three lines of options, you will only have a single line of options, as shown in the image below (02). To expand the view, click on the double arrows (00) highlighted by the red arrow in the image below. This will expand the message area so all three lines of options are available.