Technically this is doable same as we do the amazon oneboxes, amazon provide zero help with embedding in this department.
- As Facebook muck around with HTML we would need to keep updating the onebox
- It is unclear if we are even permitted to onebox this stuff
If Facebook are keen to have this type of content onebox-able, why don’t they make it easy? Is there a Facebook dev forum somewhere you could ask for advice and Facebook’s position on this?