Add this code on Appearance Customize > Additional CSS :

How to get Youtube API:Go to: https://console.cloud.google.com/apis/dashboard How to check Youtube API Quota:Go to: https://console.cloud.google.com/iam-admin/quotas

Go to Dashboard > Appearance > Customize and add this custom CSS. LIGHT MODE CSS DARK MODE CSS

If you activate the image overlay, there is an option to show play icon. And the default play icon for