It is clear that this video has a value, but why does the video display null
The value of videos only means that your variable definition is correct, but you get the DOM node with ID of videos through document. You also need to make sure that the node exists in HTML or that the DOM node has been loaded when your code runs to this step
This value does not mean that there is a VJs ID in the page_ video_ 3 DOM element, first confirm this.
Videos and video are not the same variable name
@The answer is correct