Hi @mgho092, welcome to the Community!
Thanks for reaching out about this! I did some checking and it appears the Webinar field for the New Registrant trigger is required, so a specific webinar would indeed need to be selected. This would mean that you’d need to duplicate the Zap and change the selected webinar for each one, which isn’t ideal.
I spotted we’ve got a feature request open for the abillity to trigger on any webinar so I’ve gone ahead and added your vote to that. While I can’t make any promises around when/if it will be added we’ll definitely send you an email notification once it is!
Rather than duplicating the Zap multiple times, perhaps you could use Webhooks by Zapier as the trigger instead? Looking at GoToWebinar’s API documentation they have a registrant.added event (see: GoToWebinar webhooks) that you could potentially subscribe to which could send a webhook containing the registrant details to a Zap whenever someone registers. I had a quick look and couldn’t see any mention on needing to specify a specific webinar so it seems like it would work for all webinars
Webhooks triggers are bit more advanced but we have a more general guide you can reference here: Trigger Zaps from webhooks. And GoToWebinar has some documenation on how to set up webhooks on their end which may be helpful too: How to use GoToWebinar webhooks.
Keen to ensure you’re all set so please keep us updated on how you get on with this!