chitaranjan.thoudam – I have the same problem – it only works when I am logged in.
Not sure how to do step 3 SN0WKRASH – where do you do this?
David your post on https://wordpress.org/support/topic/getting-no-longer-supported-video-from-youtube was really useful – it all worked for me – and looks good when I am logged into wordpress but not when I go to the front end – tied numerous computers with browsing history deleted. Any suggestions?