Usually, when a video on Peertube is listed and not playing, its thumbnail screen shows an image of the first frame.
On my videos, I am just getting a blank image:
The video plays fine, but shows no thumbnail. I know it’s possible to add a thumbnail image manually to the video, but if I do that, that image then appears on top of the video.
Why are my video first frames not appearing in thumbnails?
Thanks for any help.