Make sure persona theme and core is latest too.
[Solved] YouTube embed not working on 0.41
-
It was working fine earlier. But as you can see in the thread below. It has stopped autoembeding YouTube links
http://www.techiewiz.in/topic/19/how-to-use-a-windows-xp-software-in-windows-7-or-windows-8#27
-
marking this as solved (https://community.nodebb.org/topic/1332/youtube-embed-not-working#9734)