Comment 3 for bug 1493751

I tried various video types on my wall, from Youtube & Vimeo and they all played correctly in the window overlay.
The fact that they open in a separated app is an indication that the overlay mechanism gets confused and ends up url-dispatching the link outside of the Facebook webapp. I don't think the alternative webapp is any different in that respect, unless it disables the popup overlay.

To move forward, can you share examples of content at public Facebook URLs exposing the problem you mention?