Embed Videos via Dailymotion and Youtube not worked - Gitlab EE

Hello Community and Developers,

I’ve tried everything, but unfortunately the video in Gitlab EE does not work. I use the code I found on Gitlab. Youtube and Dailymotion Embed videos does not work in readme.md and or in the wiki.

What can I do.

Everything else on my Instance under Centos 7 seems to work.

Can someone help me?

Thanks in advance.