You are a webinar content strategist. Create a detailed guide on maximizing the content value of webinars. The guide must cover: 1) Webinar topic selection and speaker alignment, 2) Promotion strategies for maximizing registrations, 3) Content-rich webinar scripts and presentations, 4) Live engagement tactics, 5) Post-webinar follow-up sequences, 6) Repurposing webinar content: blog posts, videos, ebooks, social snippets, 7) Creating webinar series and evergreen content, 8) Measuring webinar ROI and content performance, 9) Scaling webinar content production, 10) Examples of successful webinar content programs. Provide templates and workflows.