Video not display on Blog site

Hey Guys,

I insert a Video in my post (using the layout builder) and it worked fine on the single post page. But the video is not showing on the Blog page. I used the media element “Video” and also embedded the video in the text element.

I also marked the post format as “video” but always when I press save, the field for “post format” disappears. But in the post overview this post is marked as “video format”

I also updated all Plugins and I deactivated all Plugins – problem was still there.

I need to use the layout builder in this case.

Do you have any idea, where I did the mistake? Thank your for your help!