Allow Facebook video embeds

Hey,

I added a Facebook provider as a submodule (called video_embed_facebook). I also used it as an opportunity to both provide an example module that adds a handler and also to write a blog post walking through that. As soon as the blog post is published I'll link it here.

Hope that works for you, let me know if you have any issues - I didn't test it extensively.

I couldn't figure out the autoplay either, I can spend more time looking at it.

That stack overflow post is exactly how I'm (trying) to do the thumbnail stuff. For whatever reason, it seems to be a permissions issue, some videos (even though they have thumbnails) show that not found image. I'll try to read more documentation on what the options for making this work are - the definite way to make it work is implementing OAUTH and then granting access to the application from facebook ... but that seems a bit overkill for this purpose. Hopefully there is an easier / better way to get the thumbnail that doesn't have these issues.

I think dev should be safe to use on prod, I don't have any open bugs right now, there are some feature requests still open (which you know) and I would like to get to those, I'll roll a beta5 soon - I just want to make sure that nothing new got broken first

Here's a link to the blog post i was referring to
http://www.agileapproach.com/blog-entry/creating-handlers-video-embed-field