With videos it happens to me too.. if you add title and click on it it will open video page and show it ok... back on timeline it looks like yours.... then i go to studio and clear all cache... then video looks fine on timeline... i dont have issues with images(yet)...
Thank you so much for your reply and help. In my case the video module isn't active. These videos and images were directly posted to timeline from editor. So, not sure where to chase them.
The issues happened only after re-installed Timeline module to fix other timeline module issues.
