Ok thanks for sharing the video .That was very helpful in explaining the issues .
First of all please note here that shortcodes support is not available in wplms app as of now .
If you want your embeded videos to appear in app then please use the [iframevideo][/iframevideo] shortcode like this :
[iframevideo]<iframe width=”560″ height=”315″ src=”https://www.youtube.com/embed/XnYG1WRDvw4″ frameborder=”0″ allow=”autoplay; encrypted-media” allowfullscreen></iframe>[/iframevideo]
In between the shortcode you need to put the iframe embed code .then check this in app .
You can also check this in our demo app in sample premium course .
Quiz issue :
Please make sure that you have put some content in your quiz .
refer : http://prntscr.com/ib97ba
Also try setting the retakes in that quiz and try retaking it .
If content is present and still not able to do the quiz then please simply share :
your site url and admin credentials in private reply to check this issue at your end .