Last Updated: November 18, 2013
Revision Update: Tested with the latest WordPress 3.7.1. Removed PureHtml from my recommendation because it has not being updated for too long. I have added another plugin Insert Html Snippet, which I have tested on WordPress 3.7.1.
Important: I have removed all support and information for WordPress 3.4.2 and 3.5.2. You should be running a minimum of 3.6.1.
If you install Ultimate TinyMCE which is maintained on a regular basis and supported very well, provides some nifty tools for you to add many different videos and other codes.
The browsers tested:
- IE 10, IE 9
- FireFox 25.0.1
- Chrome 33.0.1707.0 Dev
- Seamonkey 2.22
Remember: Always have the latest version of the browser installed. Make sure you clear your cache regularly. Make sure Java is updated.
Copy and paste the iframe code on your post or page through the Text editor by clicking on HTML tab. The editor will place the iframe in between < p > < /p > tag. See image below.
Using Ultimate TinyMCE.
The following instructions are for those who want to use the plugin to add an iframe. Select the following icon and add your code, url and other settings you prefer. See images below.
Remember: You need to set up Utlimate TinyMCE and add all the tools you want to include in your wysiwyg editor especially the one used in this tutorial.
I have tested Raw HTML recently, it was updated up to version 1.4.10 compatible with WordPress 3.6 Beta 2. There are some reporting issues with WordPress 3.6.1. Remember if it does not work for you, always report it to the developers. The culprit could be another plugin or the theme. Also remember that this version of the plugin is not compatible with WYSIWYG editor. It is only compatible with the HTML editor. To use with the WYSIWYG editor you need to purchase the Pro version.
Important: As always one of my golden rules create a backup before you try any new plugin just in case it causes other issues.
I hope this helps you and puts you on the right track. If you need any help just leave a comment or send me a message.
Come back for more information as I keep updating this post.