[Plugin: WP Facebook Open Graph protocol] Error :

seems like your simplesocial or another plugin is adding in duplicate og meta tags that this plugin already handles. It’s doing your video stuff but also making duplicates… You need to turn that plugin off or this one.

your locale in source seems fine – it’s outputting th_th as it should be via this plugin.

That said… other than video tags… that other plugin doesn’t do as good of a job at the open graph stuff. good luck.