I'm using Markdown and need to know how to embed a YouTube video and add comments that won't show up in the final rendered document. Can you find the hacks for 'Videos' and 'Comments' on the Markdown Guide website? For each, explain how the hack works and what it helps achieve.
Navigate to 'markdownguide.org'. Click on the 'Hacks' link in the navigation menu (ID 12). Locate the 'Videos' hack and describe how to embed a YouTube video using the provided method. Locate the 'Comments' hack and explain how to add comments that are not visible in the rendered output. Synthesize the information for both hacks, explaining how each works and its purpose.
The agent successfully navigates to the 'Hacks' page on 'markdownguide.org'. For the 'Videos' hack, the agent explains that it works by using an HTML `<iframe>` tag with the YouTube embed URL, and that it helps embed videos directly into Markdown documents. For the 'Comments' hack, the agent explains that it works by using HTML comment tags (`<!-- comment -->`) and that it helps add notes or hidden text that will not be visible in the rendered Markdown output.