Why is WordPress still adding // into my pages?

When 4.2 or 4.2.3 came out, all of my sites were broken because WordPress had been adding // <![CDATA[ // ]]> into some scripts that I had on just about every page. The scripts are for video from my CDN.

After 4.2.3, WordPress would not allow the video scripts to run because they had // <![CDATA[ // ]]>, which wordpress had been adding to my pages. So, if wordpress won’t let scripts run that contain // <![CDATA[ // ]]>, then why is wordpress still randomly adding it to my scripts?!?!

I just added an image, and when I did, WordPress adding // <![CDATA[ // ]]> to my video script. Then videos wouldn’t play on another page, and there was // <![CDATA[ // ]]> again. I just built this site yesterday and I know that // <![CDATA[ // ]]> wasn’t in the code.

Is there some way to stop this maddness?

Thanks