When you include a link to a video in your Moodle text, and save the text, the built-in video filter will automatically turn it into a video player. Often, this is a great thing, but occasionally you may not want that to happen. You may want your link to appear as a link, instead.
Here are the instructions for doing just that:
1) In the Moodle editor, select the FULL link text
2) With the link selected, click on the Prevent auto-link button (the one with the bold exclamation mark on it, usually located beside the link and unlink buttons)
3) Save your changes