Recently in our forum, we realized that youtube videos are not integrating, (even all old ones posted, dissappeared), and today we found out that polls show, but dont work. We cant click on them.
Here is a link to the forum, where there is a poll and a video not showing. (The video is under the poll)
We turned off plugins and updated many times, we can only think of the letsencrypt SSL, but we dont know.