That’s very weird, moreover so as I did see a thumbnail (the /wp-content/uploads/2013/05/weapon-trailer-june-7-8-9-counterpulse-150×150.jpg one) when adding the link to your post on Facebook?
I would disable SEO ultimate if I were you, just to see what that changes 😉
Thanks for your quick reply. Unfortunately your observation vis a vis the specific post you mentioned doesn’t apply in this case as that particular post came before I began using Lyte, and there were no issues, at the time, with FB interpreting thumbnail specifics when I did promote it. My issue at this moment is that NO thumbnail is being picked up by FB since using Lyte, which wasn’t an issue before with regular wordpress handling of youtube embeds (in conjunction with Video Thumbnails plugin).
I’ll continue to poke around and let you know if I find anything that might be of help. Could be theme layer. Could be something else.