Information about related videos details must be defined as a javascript objects array. See the code example below how it can be done.
<script>var related_videos = [{thumb: '//domain.com/path/to/video_thumb_1.jpg',url: '//domain.com/path/to/video_1.html', title: 'Video 1 title', duration: '05:30'},{thumb: '//domain.com/path/to/video_thumb_2.jpg',url: '//domain.com/path/to/video_2.html', title: 'Video 2 title', duration: '05:30'},{thumb: '//domain.com/path/to/video_thumb_3.jpg',url: '//domain.com/path/to/video_3.html', title: 'Video 3 title', duration: '05:30'},{thumb: '//domain.com/path/to/video_thumb_4.jpg',url: '//domain.com/path/to/video_4.html', title: 'Video 4 title', duration: '05:30'},{thumb: '//domain.com/path/to/video_thumb_5.jpg',url: '//domain.com/path/to/video_5.html', title: 'Video 5 title', duration: '05:30'},{thumb: '//domain.com/path/to/video_thumb_6.jpg',url: '//domain.com/path/to/video_6.html', title: 'Video 6 title', duration: '05:30'}];</script>
Once related_videos array is defined, you can assign it as a related option among other Nuevo plugin's options, like in player setup code below for one video available in multiple resolutions.
<script>var player = videojs('example_video_1');player.nuevo({logo: '//domain.com/path/to/logo.png',logourl: '//domain.com',related: related_videos});</script>
player.on("pause", function(){player.related();});