If you have problem with playing the youtube video in a sermon post, most probably you are using incorrect Youtube Video Link :





You can easily fix the problem by using the full youtube.com url, as opposed to the short youtu.be version. 


Example:


correct: https://www.youtube.com/watch?v=_uY0BmqmKdU

incorrect: https://youtu.be/_uY0BmqmKdU