The internet offers a wealth of free learning resources, including YouTube, TED talks, government archives, museums, newspapers and dedicated open education resources search engines. Incorporating well-chosen multimedia into your course provides students with a much richer learning experience and supports different learning preferences. Linking to websites, rather than embedding or copying content into your course will minimize the size of your course and your course upkeep.
NOTE: Leave all other options at the default settings. If you want to verify students clicked on the link, you can set the Activity completion settings.