[Plugin: Youtube Sidebar Widget] Youtube videos not playing

The video shows up and has the play button but nothing happens?

Here is a link to my site https://absolute-floorcare.co.uk/blog/

I see there are other threads like this lying unresolved whats going?

Is the latest version of the plugin broken or what? Or is the plugin developer simply gave up supporting his plugin?

https://www.ads-software.com/extend/plugins/youtube-sidebar-widget/