Hi Christina.
Thanks for posting on the forum.
Is this linking to a you tube video as such? or just the file type which is a flash file?
Most websites such as YouTube will provide an embed html code which you can enter into ActivInspire by clicking on Insert>Link>Embedded HTML.
I have created a Promethean technical support case reference should you wish to contact us directly regarding this query. Your case reference number is 00410848.
I look forward to your response.
Adam
Promethean Technical Support