Please specify correct URL

First of all, thank you for developing this plugin. It is so great.

I cannot get the youtube playlist to work. I’ve tried to embed it with different link. Please see this post where I try different URLs.
https://ge.hkbu.edu.hk/news/2014/12774/

Also, I would like to ask whether I can embed a video in my YouTube channel randomly? I mean whether the widget can randomly pick a video from videos uploaded in a YouTube channel/account/playlist. It will be very useful for a index page widget for showcasing the video gallery, e.g. https://ge.hkbu.edu.hk/.

https://www.ads-software.com/plugins/shortcodes-ultimate/