Thumbnails are determined by the player right? I made this webm and found out that 8ch uses the middle frame for the thumbnail from what I can tell. Is there a way to change this? Is there some sort of meta attribute where I can choose what frame number to use as the thumbnail or something?
I ended up inserting the frame I want to be the thumbnail as the center frame so it flashes for half a second in the middle which I'm not too happy about.