Raising this issue again...it seems to come up year over year. We also create practice webinars and they clog up our webinar history. Other webinar platforms have the option to create a real webinar or a practice webinar, and the two are separate in the webinar history list. Only the real webinars integrate with Salesforce. Something gotowebinar could definitely improve upon!
@AppsTek Deleting Past Webinar instances is not yet an option, and cannot be escalated through Customer Support at this time. As soon as we have an ETA on this development we'll update the Community Thread.
A possibility should be created to delete webinars from the list that are no longer needed. This becomes longer and longer with each webinar and therefore no longer manageable. Please provide a function to delete webinars.