Video.js – HTML5 Video Player for WordPress and OnePress Social Locker plugins do not work together.
It means you can not use Video.js – HTML5 Video Player for a single post with OnePress Social Locker and vice versa.
( Theme options > Single post/video > Player for Video File: “Video.js – HTML5 Video Player” )
These plugins have confict together. Js player can’t “DOM” after Social locker runs.
The only way is to wait for those two plugins update their product