As the title suggests.
Download a .ts file > www.w6rz.net/parkrun1920_23mbps.ts
.ts files, or at least the one you linked, don't return a value from emotion_file_meta_artwork_get(), indicating that the video plugin (gstreamer) could not find any image to use
I think tried another one at some point and didn't thumbnail either. Gst issue???
raster fixed this.
Do you have a commit reference?
i think it was this but not sure.