For some of my video posts, there is a featured image appearing when I do not set it. It will still reappear even after removing it as a featured image. It does not seem to happen right away for the posts, but after some time.
I have video thumbnails plugin and smart youtube pro plugin. I have contacted there support, and the problem does not seem to stem from those, as far as I can tell. I have tried deactivating both of the plugins and still have that problem.
Hopefully someone is able to help me.