jefferey11

This plugin allows you to embed an ogg, mp4 file or YouTube or Vimeo video into your page. As the user of your website scrolls down the page to read the rest of your article and they can’t see the video any more, the video will automatically move and stick to one of the corners of the window so they can watch the video and read the page at the same time. This creates an effect like the one that can be seen on the videos of CNN, Daily Mail, and the new material design version of YouTube.
This is very useful if you have lots of articles or pages which have accompanying videos, which the user may want to watch while also reading the rest of the article or page.
The plugin will insert a video into a post or page using a shortcode. 
The plugin also adds a button to the visual editor so that you can easily intergrate the floating video into all of your pages.

Floating Video

Display a video that, when scrolled out of view, moves to the corner of the screen so that the user can continue watching it while reading a post.

Ali Qureshi

oEmbed External Video plugin converts any external mp4 url into HTML5 video tag. This plugins is needed because WordPress oEmbed only converts urls from supported oEmbed providers. This plugin is most useful for BuddyPress Communities where members post urls to external mp4 videos in the Group and activity feeds which automatically then get embedded.
To put any external mp4 video file into a post, page, BuddyPress Activity or Group feed, simply place URL link to the mp4 video file as separate paragraph. The plugin will convert it into the HTML5 video player on the page. See screenshots.
Plugin settings page allows you to change the video player width, height, controls, autoplay, loop and muted options.
For details: http://www.parorrey.com/solutions/oembed-external-video/

oEmbed External Video

oEmbed External Video plugin converts any external mp4 url into HTML5 video tag

Floating Video vs oEmbed External Video