Hmm I'm not able to watch your YouTube video, due to:

This video contains content from [Merlin] Freemedigital, who has blocked it on copyright grounds.

Perhaps you used some music that Freemedigital has flagged as belonging to them. Anyways, perhaps try posting your video to @dtube or @dlive (especially if you consider your reuse of their content fair use, if that exists in your jurisdiction).

BTW most Steem frontends will embed YouTube videos if you paste the link: