ALL VIDEO SHARE

When you hit a third code when saving the code is changed.
For example:
Correct Code:
<iframe src="//player.vimeo.com/video/70707344" width="500" height="281" frameborder="0" webkitallowfullscreen mozallowfullscreen allowfullscreen></iframe> <p><a href=" vimeo.com/70707344 ">Compilation Best Funny Videos from vimeo.com/user14175736 ">Amen Matter on vimeo.com ">Vimeo.

The code changes to:
<i-frame src="//player.vimeo.com/video/70707344" width="500" height="281" frameborder="0" webkitallowfullscreen mozallowfullscreen allowfullscreen></iframe> <p><a href=" vimeo.com/70707344 ">Compilation Best Funny Videos from vimeo.com/user14175736 ">Amen Matter on vimeo.com ">Vimeo.

Add "-" and divides the iframe tag

You might have installed any security related plugin which converts the iframe tag to i-frame. Kindly find it and disable the plugin or configure it allow iframe tags in forms.

The problem was with the JCE editor, but if I paste the code with another editor, works fine.