iframe tag and embed shortcode stripped out of Large Description field

I’ve been using Link Library successfully for years. I have a list of video links with the embed code for the video in the Large Description field. If you click the link above and scroll down to the bottom section where the videos are displayed, you will see that the first two links are missing their embedded videos, but the links that follow do display their videos. That’s because I tried to edit the first two today and lost the embed code. The rest of the videos are still embedded because I haven’t tried to edit them today.

I am unable to get the videos to show up whether using iframe tags or using embed shortcode. iframe tags disappear from the Large Description field when I click the Update button in the editor. embed shortcode does not disappear from the Large Description field, but the code is apparently stripped out when I view the page on the front end.

I don’t know when this issue started because I haven’t tried to edit those links in years.

I am using Link Library version 7.5.10. Just updated it today.

The page I need help with: [log in to see the link]