Button code changed after saving

Hello,

When I add the attached code, after saving the Joomla article it is altered, why is this, please?

Thank you

Thank you.

Amazing product JCE Editor, the video links work really well now.

Hello,

I successfully edited the profile to allow CSS, and the button was working fine, but since Windows updated yesterday on my Surface Pro and Dell desktop, the button is no longer visible.

I've tried turning off the ESET antivirus, but still, no button.

Although, when the website is viewed on 'Localhost' (Firefox browser Surface Pro & desktop) it displays!

Thanks

http://new-web.maydaygraphics.com/drytac-sav/spot-on-clear-100mic - hosted by TSO Hosts

Screenshot of localhost page attached.

M T's

Okay, strange.

Maybe it's a Cache thing.

Thank you.