@Philemon - Just in case you missed it…
The video element currently uses the embed.ly api to make it easy for users to add a video to a page, RTF, or collection. There are limits to what display options you can change after you add the video. See the link above.
What do you do if you need more display options? Use an HTML embed.
Also get some errors in console on the publish :
Those are most likely the result of an adblocker running in your browser.
Hope this helps.