A correct embed code should always start with <iframe and end with </iframe>. In some cases, when you copy an embed code from a source, the creator of the code may have added their branding with the code which would appear with your content during course delivery. This can be very easily removed from the copied embed code.


For example, when I copied the embed code from Vimeo, that's what I received:


<iframe src="https://player.vimeo.com/video/296101859" width="640" height="360" frameborder="0" webkitallowfullscreen mozallowfullscreen allowfullscreen></iframe> <p><a href="https://vimeo.com/296101859">How to Talk to Your Kids About Race</a> from <a href="https://vimeo.com/atlanticvideo">The Atlantic</a> on <a href="https://vimeo.com">Vimeo</a>.</p>


In this embed code (shown above), I have underlined the unnecessary code, that was given after the </iframe>. Once any such code is removed, you are good to go. Some samples provided below show how the good part of the code is always written within the words 'iframe' like this-  <iframe Good part of the code </iframe>.


Sample YouTube Embed Code

<iframe width="560" height="315" src="https://www.youtube.com/embed/FPaUU0il_S4" frameborder="0" allow="autoplay; encrypted-media" allowfullscreen></iframe>


Sample Vimeo Embed Code
<iframe src="https://player.vimeo.com/video/296101859" width="640" height="360" frameborder="0" webkitallowfullscreen mozallowfullscreen allowfullscreen></iframe>


Sample Prezi Embed Code
<iframe id="iframe_container" frameborder="0" webkitallowfullscreen="" mozallowfullscreen="" allowfullscreen="" allow="autoplay; fullscreen" width="550" height="400" src="https://prezi.com/embed/3jk4domsau3i/?bgcolor=ffffff&lock_to_path=0&autoplay=0&autohide_ctrls=0&landing_data=bHVZZmNaNDBIWnNjdEVENDRhZDFNZGNIUE1JcWJJKzYzVWlod2RnejJKM1RxVnN4YmlrVHFRMnBSRTN4UGlYZHV2az0&landing_sign=y8Pwu6gL71kFjafeL5v-oMQBIl2avLfo6Qb7GLiMlS4"></iframe>