An "embed" is designed for the embedded code that YouTube provides for its videos.
Videos embedded in your page will download immediately once the page is loaded into the browser. This means that if your page has more than one embedded link in it, all the videos on the page will download. This could result in a slow page for your user, so in this case - where you want to have more than one or two videos on a page, you should consider using the playlist or custom playlist option.
The playlist option provides a link to each video on your page. This option differs from the "embed" system in that the videos are only downloaded when the user clicks on the link. The video appears immediately below the clicked link. The playlist option can be used for one or many videos.
