Adding characters to iFrame HTML code...

Trying to insert videos into the FAQ for easy client access.

Insert this...

<iframe src="https://premium.wpmudev.org/video/add-new-post" frameborder="0" width="480px" height="325px"></iframe>

Then after hitting save it turns into this...

<iframe src="\"https://premium.wpmudev.org/video/add-new-post\" frameborder="\"0\" width="\"480px\" height="\"325px\"></iframe>