youtube embed urls

How are the youtube urls replaced by shortcodes? Because somehow only the http urls are replaced and the https aren’t. I would like to fix this. How can I fix this?

I can’t change the urls manually to http because I use a script in combination with Post By Email from Jetpack. The script pushes all new post from a forum to my blog by email. The easiest way to fix this is to replace all https urls automatically like the http urls.

https://ww.wp.xz.cn/themes/p2/