It's hard to be very interactive in an hour webinar. If your webinar software allows groups (subgroups) you can set them up in groups to answer a quick question (kind of like think-pair-share) then bring them back in. A quick way to de-brief their discussion is to have a poll ready in the software so they can quickly report back their consensus from the discussion.
I did a series for a county- they loved it. I often allowed them to suggest topics for future webinars. They began asking for re-do's for their friends, so I sent them to the page where the recordings were housed.
I run 2 hour webinars for school cooperatives in NY and have found after an introduction and examples, giving the participants a 15-20 minute practice session lets them explore. When we continue as a group, the sharing is great. The exchange on how each one discovered, used, and plan on implementing int he classroom helps others see possibilities. I also record everything and post the link.