You are better off loading videojs and its plugins inline. That's what I did for my Videolist plugin.

Here are some issues that I faced with VideoJS and RequireJS:

https://github.com/videojs/video.js/issues/5680

https://github.com/videojs/videojs-flash/issues/117

https://stackoverflow.com/questions/34163777/how-can-i-use-a-videojs-plugin-when-i-also-use-requirejs

https://stackoverflow.com/questions/36352783/videojs-ima-plugin-with-requirejs-not-including-plugins-on-load

@PabloAgustin

We've same plugin for Elgg 2. Works very well.

Here's what we did.

1. You need to define 'global/window' and 'global/document'. You can find it from the mentioned above link.

2. For videojs.record.js you should define 'exports' param as 'VideojsRecord' not 'record'.

Also, use elgg_define_js('videojs', not 'video_js'

3. I don't know why you need main.js bcz we did all in one JS (dovideo.js in your case) and call it as elgg_require_js('script'); 

4. Snippet from this script is:

define(['jquery', 'elgg', 'global/window', 'videojs', 'VideojsRecord', 'elgg/ready'], function ($, elgg, window, videojs) {

window.videojs = videojs;

var player = videojs('myvideo', {
   controls: true,
   width: 640,
   height: 480,
   ....
   plugins: {
      record: {
          audio: true,
          video: true,
          ....
      } 
  }
});
 ....

Thanks!! That solves the issue