Every other type of video plays, just not YouTube. YouTube videos open, but don't load. They just stay black. I've cleared defaults, uninstalled, reinstalled. A while back I heard of many others having this problem but haven't seen the conversation lately. If it's a video I'm keenly interested in I can copy and paste the name and access via YouTube directly (YouTube app runs fine outside of FB), but I can never just click on a YouTube video that's been posted on Facebook and have it play.