It will detect the URL of the media file when you are playing a video.
The detected URL you can copy from the context menu.
Save the mediafile When you right-click(or middle-click) on the menuitem.
Copy the URL of the mediafile when you left-click the menuitem
It does not correspond to the sites that are frequently specification change such as YouTube.
※ Because there may not detect the URL of the video in the buffer already, please try to reload the page in such a case.