Hi carolanne
Welcome to the Community. At this time, there isn't an option to send a follow-up email immediately after an on-demand webinar is viewed. As you mentioned, follow-up emails are sent after the scheduled end date, and if enabled, they will include a certificate.
The certificate date will either reflect the scheduled end date of the webinar or can be customized to a specific date of your choosing (for example, the original date the webinar recording was made available). However, it won't be tied to the date the on-demand webinar was actually viewed by the attendee.
To achieve more precise follow-up timing, you can adjust the webinar's timeframe settings to create a smaller window for follow-up emails.
Additionally, we encourage you to share your suggestion for more customizable emails and certificates for on-demand webinars in our Community Idea Forum where the team reviews ideas for future feature updates.