Vue VideoJS in UIBuilder

[UnborN]

@j2l

Error in mounted hook: "TypeError: The element or ID supplied is not valid. (videojs)"

The error gives a clear indication where to look.
You mentioned that you removed the first video player component from Julian's example.
But in index.js in mounted() the code tries to initialize a player in an element with id 'my-video' and none is found.

 app.player = videojs('my-video')
        console.log(app.player)

I didnt study the code in depth but try use an id="my-video" on the second player that you have in your modified code.