[Solved] Embedding not working as it should

Hello, I hope you can help me out.

I bought a few addons today.

The embed-addon does not work like it works on your DEMO website.

WHen I paste a YouTube-link of a video, for example, the link turns blue automatically but the video itself will not play in the comments.

I suspect I have to disable some option that causes this.

Can someone help me?