On your YouTube video page click share.
Login to Blackboard and navigate to your course page.
Select the “Content” Tap under your course name.
Select the build content tab under the main Content heading.
Select Create item.
Click the html button in the editor.
Paste embed code in there and select update. Note that you must embed the HTML code found in the “embed” option after you select “share” on Youtube, rather than using the generic web address.