Posts with a Video format works incorrectly

I got 1 template on 2 different sites. When I want to use a video format for a post, it does work on one site, and doesn’t on another. I just paste a link to the video in the Video URL test area, first choosing the Video format. Here:
Works: https://kimep.aptekar.kz/queen/
Doesn’t work: https://dknews.kz/rolik-delovogo-kazakhstana.htm

I would be grateful for any ideas and thought that might help solving this issue.