Help debugging the media features, specifically YouTube

I’ve tried six ways from Sunday to get Matomo to show me details about YouTube video stats, play pause, skip, etc, but I can’t get it to work. What am I missing? I am using Matomo Cloud, appended the code to the end of the YouTube url and of course have the Matomo tracking added via Google Tag Manager.
Can somebody eyeball this and tell me if I am missing something simple?

The play now button on the homepage.

It seems it is a problem with GTM…?
As a first test, can you track what you want with GTM to Google Analytics?