Video CMS connection not working

Hey Everyone,

i am having a nasty issue concerning my cms collection. I have read probably all cms related issues in this community but its just not working in my template i bought. When i go to my cms collection settings and i add a new video link field and paste my yt video url in this field it shows in the little preview that the video exists. However when i then go to my editor/designer and i drag a new video element (not the yt video element) into the field collection item i dont get the little purple dot in the settings on the right to create a connection to the corresponding cms field to laod the url dynamically. I dont know anymore what to to, please help me :(

My CMS collection:




Here is my public share link: LINK
(how to access public share link)

Hi Florian, can you share your readonly designer link?
Instructions are at the bottom of your post.