I have noticed several members have not been able to post the YouTube videos on AAPK.
I was having the same problem till I discovered what was going wrong.
This is a copy of an address from YouTube, you need to cut off everything after "tok", the "&feature=youtu.be" needs to be removed when you post the address in the brackets on an AAPK post as show above by Bryan.Leave this part http://www.youtube.com/watch?v=X44CxU2wtOk&feature=youtu.be
Cut this part off.
Then the video should show up properly in your post