webvitalii

<ul>
<li><a href="https://r.freemius.com/13759/8047958/" title="Advanced iFrame" rel="nofollow ugc">Advanced iFrame</a></li>
<li><a href="http://web-profile.net/wordpress/plugins/iframe/" title="Plugin page" rel="nofollow ugc">iframe</a></li>
<li><a href="http://web-profile.net/donate/" title="Support the development" rel="nofollow ugc">Donate</a></li>
<li><a href="https://github.com/webvitalii/iframe" title="Fork" rel="nofollow ugc">GitHub</a></li>
</ul>
[iframe src=”http://www.youtube.com/embed/7_nAZQt9qu0″ width=”100%” height=”500″] shortcode 
should show something like this:
<iframe loading="lazy" class="youtube-player" width="750" height="422" src="https://www.youtube.com/embed/7_nAZQt9qu0?version=3&rel=1&showsearch=0&showinfo=1&iv_load_policy=1&fs=1&hl=en-US&autohide=2&wmode=transparent" allowfullscreen="true" style="border:0;" sandbox="allow-scripts allow-same-origin allow-popups allow-presentation allow-popups-to-escape-sandbox"></iframe>
WordPress removes iframe html tags because of security reasons. 
Iframe shortcode is the replacement of the iframe html tag and accepts the same params as iframe html tag does. 
You may use iframe shortcode to embed content from YouTube, Vimeo, Google Maps or from any external page.
If you need to embed content from YouTube, Vimeo, SlideShare, SoundCloud, Twitter via direct link, you may use <code>[embed]http://www.youtube.com/watch?v=7_nAZQt9qu0[/embed]</code> shortcode. 
[embed] shortcode is a core WordPress feature and can <a href="https://codex.wordpress.org/Embeds" rel="nofollow ugc">embed content from many resources via direct link</a>.
Important: You can not embed HTTP pages into HTTPS pages and vice versa. 
So the protocol (http or httpS) for parent and embedded page should match.
<h4>iframe params:</h4>
<ul>
<li>src – source of the iframe: <code>[iframe src="http://www.youtube.com/embed/7_nAZQt9qu0"]</code>; by default src=”http://www.youtube.com/embed/7_nAZQt9qu0″;</li>
<li>width – width in pixels or in percents: <code>[iframe width="100%"]</code> or <code>[iframe width="600"]</code>; by default width=”100%”;</li>
<li>height – height in pixels: <code>[iframe height="500"]</code>; by default height=”500″;</li>
<li>scrolling – with or without the scrollbar: <code>[iframe scrolling="no"]</code>; by default scrolling=”yes”;</li>
<li>frameborder – with or without the frame border: <code>[iframe frameborder="0"]</code>; by default frameborder=”0″;</li>
<li>marginheight – height of the margin: <code>[iframe marginheight="0"]</code>; removed by default;</li>
<li>marginwidth – width of the margin: <code>[iframe marginwidth="0"]</code>; removed by default;</li>
<li>allowtransparency – allows to set transparency of the iframe: <code>[iframe allowtransparency="true"]</code>; removed by default;</li>
<li>id – allows to add the id of the iframe: <code>[iframe id="custom_id"]</code>; removed by default;</li>
<li>class – allows to add the class of the iframe: <code>[iframe class="custom_class"]</code>; by default class=”iframe-class”;</li>
<li>style – allows to add the css styles of the iframe: <code>[iframe style="margin-left:-30px;"]</code>; removed by default;</li>
<li>same_height_as – allows to set the height of iframe same as target element: <code>[iframe same_height_as="div.sidebar"]</code>, <code>[iframe same_height_as="div#content"]</code>, <code>[iframe same_height_as="body"]</code>, <code>[iframe same_height_as="html"]</code>; removed by default;</li>
<li>any_other_param – allows to add new parameter of the iframe <code>[iframe any_other_param="any_value"]</code>;</li>
<li>any_other_empty_param – allows to add new empty parameter of the iframe (like “allowfullscreen” on youtube) <code>[iframe any_other_empty_param=""]</code>;</li>
</ul>

iframe

[iframe src="http://www.youtube.com/embed/7_nAZQt9qu0" width="100%" height="500"] shortcode

Dave Kiss

videogallery

<h4>100+ 5-star Reviews! Vimeography is the Best and Most Powerful Video Gallery Plugin for Membership and Course Sites. ★★★★★</h4>
<iframe loading="lazy" title="Intro to Vimeography" src="https://player.vimeo.com/video/44555634?dnt=1&app_id=122963" width="750" height="422" frameborder="0" allow="autoplay; fullscreen; picture-in-picture; clipboard-write"></iframe>
More than 10,000 websites use Vimeography to show their Vimeo videos on their own WordPress website.
Vimeography is a free WordPress plugin that allows you to create your own Netflix style website with beautiful, custom Vimeo video galleries in 30 seconds, tops!
Our video gallery plugin is used to power over 10,000 video membership, course, and portfolio websites.
For more information, check out <a href="https://vimeography.com/?utm_source=wpdotorg&utm_medium=description" title="vimeography.com" rel="nofollow ugc">vimeography.com</a>
Some amazing features:
<ul>
<li>Automatically add videos uploaded to a Vimeo user account, channel, or showcase to your video gallery</li>
<li>Easily insert video galleries on a page, post or template with one click</li>
<li>Set a featured video to appear as the first video in your Vimeo video gallery</li>
<li>Change your Vimeo video gallery’s appearance with custom themes</li>
<li>Tweak your video gallery theme’s look with the appearance editor</li>
<li>Control the video gallery width using pixels or percentages</li>
<li>Built-in caching for quick page loads</li>
</ul>
<blockquote>
<h4>Vimeography Themes</h4>
Make your gallery stand out with our custom video gallery themes! All themes come with one year of updates and support.
Check our all of our video gallery designs at <a href="https://vimeography.com/themes?utm_source=wpdotorg&utm_medium=description" title="vimeography.com/themes" rel="nofollow ugc">https://vimeography.com/themes</a>
</blockquote>
<h4>Want more features?</h4>
<a href="https://vimeography.com/pro?utm_source=wpdotorg&utm_medium=repo" title="Vimeography Pro" rel="nofollow ugc">Check out Vimeography Pro</a> for additional features:
<ul>
<li>Create searchable galleries</li>
<li>Create shareable links to videos in your collection</li>
<li>Show unlimited videos</li>
<li>Enable download links for your videos</li>
<li>Show hidden videos, create auto-playing playlists, custom sorting and more!</li>
<li>Supports Vimeo video interaction tools (end screens, cards, email capture)</li>
</ul>

Vimeography: Vimeo Video Gallery WordPress Plugin

The easiest way to create beautiful Vimeo video galleries on your WordPress site.

iframe vs Vimeography: Vimeo Video Gallery WordPress Plugin