Custom URL problem

Hello,

So I’ve tried to add a video to the library using the Custom URL option. I’ve done it before on another website I created so I’m pretty sure that I’m adding the video correctly. In any case, when I try to add the video to the library, I fill out the requested information and then press “Save”. After that I recieve the message “Added Successfully …“. But the video is not listed in the gallery.

Does anyone know what’s going on?

https://ww.wp.xz.cn/plugins/contus-video-gallery/