Currently, the student sees only what you’ve placed onto the activity via the Hyperlink tool. The system does not place a thumbnail of the target URL or video onto the activity. For safety reasons, you must do that for the students. 

You can put a meaningful name onto your hyperlink like in the screen capture below. This is a best practice so your student doesn't see a raw https:// address. 

When you use the Hyperlink tool, you draw a box on your activity. Then you select the Edit Hyperlink button from the toolbar, add in the URL, and give the box a meaningful label that the student will read.

PRO TIP: If you’re concerned that the student won’t know what to do, start your label with “Click here to…”