useless button under video

Under every video embedded, there is a square X button enclosed inside a p element, bearing the classes “arve-btn arve-btn-close arve-hidden btn btn-default”. Nothing happens by clicking on it, so it’s a useless button that just sits there, taking up space. What could I possibly do to have that button removed please?

https://ww.wp.xz.cn/plugins/advanced-responsive-video-embedder/