Vlad

While being tailored for <a href="https://iplayerhd.com/cms/refer/10235175-966c-4d78-a75d-04c6159c0e02" rel="nofollow ugc">iPlayerHD Video Hosting</a> users, the plugin should work 
with any video which can be embedded via an iframe. Simply set the width and height attributes to fit 
your video’s format and you’re all set!
<a href="https://iplayerhd.com/cms/refer/10235175-966c-4d78-a75d-04c6159c0e02" rel="nofollow ugc">iPlayerHD</a> users can get a shortcode link with all of the required parameters 
automatically though the <a href="https://iplayerhd.com/cms/refer/10235175-966c-4d78-a75d-04c6159c0e02" rel="nofollow ugc">iPlayerHD</a> CMS.
<a href="https://iplayerhd.com/cms/refer/10235175-966c-4d78-a75d-04c6159c0e02" rel="nofollow ugc">iPlayerHD</a> users also get additional options such as playlist embeds and popup embeds.
<h4>Shortcode examples:</h4>
[iplayerhd src=”https://www.youtube.com/watch?v=dQw4w9WgXcQ”] – by omitting width and height parameters the video is embedded in 16:9 format
[iplayerhd src=”//iplayerhd.com/player/video/5ae4df93-5734-4e29-9f2e-15ff9056b7e4?cbartype=auto” width=”1024″ height=”768″]
<h4>Shortcode parameters:</h4>
<ul>
<li>src – source of the iframe, defaults to: http://iplayerhd.com/player/video/5ae4df93-5734-4e29-9f2e-15ff9056b7e4?cbartype=auto</li>
<li>width – width of video in pixels, defaults to 640 – if the video is in 16:9 format you can omit this parameter</li>
<li>height – height of video in pixels, defaults to 360 – if the video is in 16:9 format you can omit this parameter</li>
<li>popup – for <a href="https://iplayerhd.com/cms/refer/10235175-966c-4d78-a75d-04c6159c0e02" rel="nofollow ugc">iPlayerHD</a> users only – embeds a thumbnail which opens the video in a lightbox-style popup, defaults to ‘false’</li>
<li>player-mode – for <a href="https://iplayerhd.com/cms/refer/10235175-966c-4d78-a75d-04c6159c0e02" rel="nofollow ugc">iPlayerHD</a> users only – possible values: ‘video’, ‘playlistRight’, ‘playlistBottom’ – user for embedding iPlayerHD playlists, defaults to ‘video’</li>
</ul>

Free Responsive iframe Video Embeds

Use the [iplayerhd] shortcode to easily add responsive iframe-based video embeds to your website (YouTube, Vimeo, iPlayerHD and more...)

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

Free Responsive iframe Video Embeds vs iframe