TYPO3 Core

Take a External video URL like
http://www.youtube.com/watch?v=ow7eEWh37iU

In fresh clean working typo3 6.2.2 with IntroPack:
+ Add Media content element.
+ Goto Video Element and add External URL using the icon(!) "Select file or URL".
+ Notice the http:// in front of the complete URL
+ Set Link
+ Notice the http:// is not longer there in the "Path or URL to fallback ..."

Look at rendered code on the FrontEnd:
No object code is rendered at all.

Readd the http:// directly in the
"Path or URL to fallback ..." (without using the icon)

Look at rendered code on the FrontEnd again:
Now you will see no video, but at least the object-code is rendered.
(See bug 1: data-value is useless for viewing video in browser)