The Video Plugin embeds a video player on a wiki page. The video itself must be uploaded to a supported video site and the key from that service used to configure the plugin. Drag and drop makes this easy in some cases.
See GitHub 
for plugin source.
YOUTUBE CI7T2iuGjjc Merritt Raitt's race to work is narrated by Tour de France TV commentators Phil Liggett and Paul Sherwin.
Factory
You can drag and drop a video to a factory and have it turn into an embedded video. Drag the location item (not the tab) for either player. Or drag the video thumbnails from the google search result pages.
Double-click to edit the caption. The caption retains a little bit of wiki's click and drag behavior while the embedded video player 'owns' the rest of the item.
Keys
The plugin's text contains the caption and commands specifying player details especially the identification key used to select the video to be played. This can be edited manually. Find the key for your video in its url or embed code.
Commands
Double-click the caption to enter a key or change the caption.
Say YOUTUBE and a Key from YouTube.
Say **YOUTUBE PLAYLIST** and a Key from YouTube Playlist.
Say VIMEO and a Key from Vimeo.
Say ARCHIVE and a Key from Internet Archive.
Say TED and a Key from a TED Talk.
Say TEDX and a Key from a TEDx Talk.
Say **CHANNEL9** and a Key from a Channel 9 Talk
Say **HTML5** and Keys for an HTML5 Talk
Say other things for the caption.