Google Tag Manager play event for embedded Vimeo video

Design help CMS
#1

Hi all! I have a Vimeo video embedded on my website. I’d like to fire a Google Tag Manager custom event when users click to play that video.

Here’s the GTM documentation on implementing a custom event: https://support.google.com/tagmanager/answer/7679219?hl=en

I’ve tried to add a Custom Attribute called “onClick” but that attribute is reserved.

Thank you in advance!