If you see the following message when reviewing a welcome video, or any Media Library video embedded into a page in Canvas, it is because you have not yet authorized Panopto (Media Library) to play content for you.

Click the button that says Click to sign in and play video and the following window will open.

To avoid seeing this message each time you load a video, select the Remember my authorization for this service check box before selecting Authorize.

The video will now load for you back in Canvas.