I'm working on a blog with hundreds of old posts, and new posts being added daily. I can't change their flow of filling out the yoast meta tag for title. They want the og:title value to be something else though, a custom post_meta value from the same post.
How can I hook into yoast before they grab the title, and say "Don't use the yoast title, instead if we have a custom title filled out, use this one."
If this isn't possible, an alternative option would be to just output a duplicate og:title tag either before or after yoast, so that the yoast tag is ignored. Would I place my tag before or after to wipe out the yoast tag, and would there be a negative impact from having the two tags?