Unable to edit question after adding a Youtube video

Hi there, I have created a form and add a section with a title and some description text, then I imported a Youtube video, but once the video is imported it prevent me from editing the description text. I can edit the section title, but not the description text.

When I preview the form, I can see the description text, I just can't see or make changes once the video is imported.

Can anyone help please.

During Preview

During Editing (unable to edit description, or remove video)