This plugin doesnt work

Hello ,

I download and install the plugin but it doesnt work. It automaticly create the pages with shortcodes i aplly the settings i was able and the problems are as follow:

1. No player options like ( youtube bar) only one big play button and double click fullscreen and thats it.
2. I delete your videos and try to put some random video from youtube and after save says that is saved but i dont see it in videos list. (i try a few times and nothing)

I install this plugin on 4.0 version of wordpress and got the same problems.

Ive checked your demo website and notice there you have a few more scripts loaded as ui nav bar and so.. i scan your plugin folder and didnt find them.

I check the source code and the only script that its loading its <script type="text/javascript">function current_video(vid,title){ document.getElementById("video_title").innerHTML = title; }</script>

I realy like the idea of the plugin but as i see in support there are alot of problems and u want us to pay 100$?

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