Replacements for the Widgets extension

Following the permanent removal of the Widgets extension due to a security vulnerability, and the potential for future risk, here are some viable replacement options:

Extensions: the TimedMediaHandler, Video, or YouTube extensions may be viable replacements.

JavaScript: HTML:

Note: If the URL you are attempting to frame is blocked by the Miraheze content security policy, it will not work. The current URLs that will work (as of 26 March 2021) are listed below:
 * Add the JavaScript to either MediaWiki:{Skin}.js, or MediaWiki:Common.js
 * Add the HTML to any wiki page or template you wish to display the embedded IFrame.

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