Past entries with the Video Element still works if left untouched. Isn’t that strange?
Thanks for looking into this nonetheless. I’ll see if my host has a solution.
cheers!
I found the problem, it only arises when the “Duplicate Post” plug-in is used.
Somehow, the thumbnail sticks to the duplicated post and shows up identical in the Enfold Latest Portfolio Widget.
Duplicated the page is convenient but I also realised that I can save “Templates”.
So, all is good. Sorry to trouble.